A fist pump. A leaping punch to the air. A thumbs up. We’ve seen it all in post-match celebrations. Or have we?

American Jack Sock was more like Pirates of the Caribbean’s Captain Jack Sparrow when celebrating his straight-sets win over Marin Cilic on Friday at the US Open to reach the fourth round.

⚔⚔⚔⚔⚔⚔ @JackSock #usopen pic.twitter.com/NnXPx2Z7W4

— US Open Tennis (@usopen) September 2, 2016

“I was fencing with my racquet,” Sock explained. “I became good buddies in Rio with one of the fencers, Miles Chamley-Watson. He lives here in New York. I have been trying to get him to come out and watch a match. He was able to come out here today. Kind of on the spot I thought of turning the racquet into… I think it’s called a foil… Thought of turning the racquet into one of those and doing something for him for coming out.

“I think people were enjoying it. I have seen the video. It looks pretty funny, actually. So if he’s in the box on the next one and I’m able to win, you might see a cleaned up technique and better version of it.”

Sock’s next opponent, Jo-Wilfried Tsonga, also did a unique post-win celebration after beating Kevin Anderson on the Grandstand. The Frenchman, often noted for his likeness to the late Muhammad Ali, shadow boxed to celebrate a straight-sets win as he advanced to the fourth round for the third year in a row.

Fighting his way into the fourth round. @tsonga7 #usopen pic.twitter.com/hpELxetyq4

— US Open Tennis (@usopen) September 2, 2016

So which celebration will we see after their fourth round clash on Sunday? We’ll have to wait to find out!

Former World No. 8 Marcos Baghdatis is turning back the clock this week in Flushing Meadows. The Cypriot ousted American qualifier Ryan Harrison 6-3, 7-6(4), 1-6, 6-1 on Friday at the US Open, reaching his first Grand Slam Round of 16 since the 2009 Australian Open.

Baghdatis fired 37 winners, including 10 aces, to prevail after two hours and 52 minutes. He was effective on return as well, converting six break chances. It is the 31-year-old’s best result in 11 appearances at the Billie Jean King National Tennis Center.

“I’m happy I’m in the second week,” said Baghdatis. “It’s been a long time and I’m happy it came here. I never passed into the second week at the US Open. I don’t miss a lot of balls and give a lot of free points. When I need to attack, I do. I’m very happy with the way I’m moving and returning.

“My goal is to finish my career in the Top 20 (of the Emirates ATP Rankings). It’s a big challenge and I want to achieve that. I’m putting the right people around me to do it.”

Baghdatis will next face 10th seed and two-time US Open quarter-finalist Gael Monfils on Sunday. Monfils, who defeated Nicolas Almagro 6-4, 6-2, 6-4, owns a 2-1 FedEx ATP Head2Head edge over the Cypriot. He most recently earned a straight-set win at the ATP World Tour Masters 1000 event in Cincinnati just last month.

“The good thing is I played him in Cincinnati,” Marcos said about Monfils. “I know what to expect and it’s going to be a tough battle, but I’ll try my best.”

Harrison, meanwhile, capped a strong week at his home Grand Slam, finishing with his best major result. One of four Americans to reach the third round, he notched the biggest win of his career in downing fifth seed Milos Raonic on Thursday.

#NextGen star Kyle Edmund set a high-powered fourth round encounter against top seed Novak Djokovic after stunning No. 1 American John Isner 6-4, 3-6, 6-2, 7-6(5). Edmund, who converted his third match point after two hours and 42 minutes, withstood a serving barrage from Isner that included 27 aces.

The 21-year-old Brit saved six of seven break points for his second upset of a seeded opponent this week. He opened the tournament with a straight-sets victory over 13th-seed Richard Gasquet on Monday.

Making his US Open main draw debut, Edmund has dropped just one set en route to his first major Round of 16. He will face off against Djokovic for the second time this year, having lost in the first round at the ATP World Tour Masters 1000 event in Miami, in March.

After reaching the quarter-finals in 2011, Isner has fallen in the third round in New York in four of five years since. It marked just the American’s second defeat to an unseeded player at his home Grand Slam and first since 2008.

Novak Djokovic has had an easy passage to the US Open fourth round… perhaps a little too easy. The top seed was leading 4-2 in Friday’s third-round meeting with Mikhail Youzhny when the Russian retired with a leg injury.

Having received a walkover from Czech Jiri Vesely in the second round, Djokovic’s biggest concern heading into the second week of the Open will be a lack of match play. Top of mind will be the walkover Djokovic received from Fabio Fognini in the Roland Garros quarter-finals in 2011. At the time Djokovic was on a 43-match winning streak but the disruption to his rhythm caused by the Fognini walkover was attributed in part to his stumble against Roger Federer in the semi-finals.

Djokovic will meet the winner of John Isner and Kyle Edmund in the fourth round.

Jack Sock has come a long way from finding himself in a five-set battle with Taylor Fritz in the first round on Monday. Four days later and the American is through to the US Open fourth round for the first time after upsetting seventh seed and former champion Marin Cilic 6-4, 6-3, 6-3.

The 26^th-seeded Sock, who had fallen in the third round twice before, dominated proceedings, winning 28 points more than Cilic and limiting himself to just 15 unforced errors as he prevailed in one hour and 41 minutes.

Sock recorded his first Top 10 win in a major to reach the last 16 at a Grand Slam for the second time, having also done so at Roland Garros last year (l. to Nadal). Looking to reach his first Grand Slam quarter-final, Sock will face Jo-Wilfried Tsonga.

The 23-year-old Sock is coming off a memorable summer, which saw him clinch a mixed doubles gold medal at the Olympics, alongside Bethanie Mattek-Sands, and bronze in the men’s doubles with Steve Johnson. He was also a quarter-finalist at the Citi Open (l. to Karlovic) and reached the third round in Toronto (l. to Wawrinka). Earlier in the year, the Kansas resident was runner-up in Auckland and Houston.

Cilic was looking for a repeat of his 2014 title-winning run at Flushing Meadows. The Croat, who is playing his first tournament with new coach Jonas Bjorkman, came into the US Open in top form, after winning his first ATP World Tour Masters 1000 title in Cincinnati, where he defeated Andy Murray in the final.

Ninth seed Jo-Wilfried Tsonga showcased a new boxing-style celebration as he sealed his place in the fourth round of the US Open on Friday. The Frenchman, oft-likened in appearance to the late Muhammed Ali, defeated Kevin Anderson 6-3, 6-4, 7-6(4) before showcasing his shadow boxing moves on Grandstand.

The 31-year-old Tsonga avoided a fourth set as he fended off a set point in a lengthy 10^th game of the third set, before edging Anderson in the ensuing tie-break to claim victory in two hours and 50 minutes.

“It’s never easy to play that kind of player,” said Tsonga. “He’s serving well. He’s also moving well from his baseline for his height. Today it was a good challenge for me to beat him. I did it well. It was a good match for me.”

A good run at the US Open could see Tsonga mount a late charge in the Emirates ATP Race To London. He is currently 16^th, more than 1000 points behind eighth-placed Gael Monfils. Injuries have blighted parts of his season, but the right-hander came back strongly at Wimbledon, where he reached the quarter-finals (l. to Murray).

As he looks to reach the US Open quarter-finals for the third time, Tsonga will face Jack Sock. The Frenchman reached the last eight in 2011 (l. to Federer) and 2015 (l. to Cilic).

No. 10 seed Monfils surged into the second week with a confident 6-4, 6-2, 6-4 win over Nicolas Almagro in the third round. After cruising to a two-set lead, Monfils emerged the winner by taking an unusual third set which featured five consecutive breaks of serve.

The Frenchman only dropped six first-serve points in the one-hour, 49-minute victory and broke Almagro seven times to even his FedEx ATP Head2Head rivalry at 3-3. The explosive Monfils stayed within his comfort zone against the hard-hitting Spaniard, firing 31 winners and only 20 unforced errors. Meanwhile, Almagro hit 18 winners and succumbed after making 42 unforced errors.

In the fourth round, the 2010 and 2014 US Open quarter-finalist will take on Marcos Baghdatis. The Cypriot’s lone victory against Monfils came a decade ago at the ATP World Tour Masters 1000 event in Cincinnati.

Rising French star Lucas Pouille is into the second week in New York after outlasting Spanish veteran Roberto Bautista Agut 3-6, 7-5, 2-6, 7-5, 6-1. The 22 year old, who reached his first Grand Slam quarter-final at Wimbledon this year, is into the fourth round of a major tournament for the second time. The No. 24 seed broke serve in the final game of a tight fourth set, then raced to a 5-0 lead in the final set against Bautista Agut. He finished with 67 winners, including 14 aces.

You don’t want to go the distance with Kei Nishikori. When matches get extended to deciding sets, Nishikori is the most successful player of all time winning them. This speaks to how well his physical game holds up under pressure, and how strong his mind is to not buckle with both players in the match so close to the finish line. 

A FedEx ATP Performance Zone analysis reveals that Nishikori takes a 50-50 battle at the start of a deciding set and wins almost eight out ten of them. In a one-set shootout to decide the final outcome, Nishikori’s will to win and ability to craft a winning game plan helps him find another gear to elevate himself above the pack.

The career Top 10 list is this category is a mixture of playing styles from different eras, indicating that success in this area is not predicated on specific physical attributes, but rather mental and emotional toughness under pressure.

View Career Performances In Deciding Sets 

Interestingly, every player in the Top 10 Career Deciding Sets Won index has been ranked in the Top 4 of the Emirates ATP Rankings, with seven of them former World No. 1s.

The FedEx ATP Performance Zone win-loss index also uncovered several other former World No. 1s in the 10-20 range, including Boris Becker (12), John Newcombe (13) Thomas Muster (14), Mats Wilander (15), Yevgeny Kafelnikov (19) and Ivan Lendl (20).

In 2016, Nishikori is continuing his outstanding performance in deciding sets, going 11-3, placing him in sixth place this season with a 78.6 win percentage. The five players in front so far in 2016 are Dominic Thiem (95 per cent / 19-1), Novak Djokovic (85.7 per cent / 6-1), Milos Raonic (84.6 per cent / 11-2), Tomas Berdych (80 per cent / 8-2) and John Millman (80 per cent / 8-2).

In the past 52 weeks, Thiem has won the most deciding set matches with 21, with Murray a close second with 18 wins, and Nishikori tied for third place with Benoit Paire and Nadal with 16 victories.

Third seed Stan Wawrinka looked like a man on a mission in his second round dismissal of qualifier Alessandro Giannessi, downing the Italian 6-1, 7-6(4), 7-5 at the US Open.

Wawrinka, a semi-finalist in two of the past three years in Flushing Meadows, has not dropped a set en route to the third round. The Swiss completed the victory in two hours and 28 minutes, striking 57 winners, while turning aside 10 of 11 break points faced.

“It’s always better to win in three sets, that’s for sure,” said Wawrinka. “But I was ready to go even longer in that court. It was not as hot as the other day, but it was really humid. I think except for that little moment when I got broken in the second, there were a few games when I was a little bit out of it mentally and not as focused as I wanted. But I came back. In general, I think it was a great level.”

Giannessi capped an impressive run through qualifying, which saw him reach his first Grand Slam main draw, and claim his first tour-level match win in more than four years. Wawrinka admits the World No. 243 gave him a stern test.

“I never played against him, but I watched him before,” Wawrinka said of Giannessi. “I talked with [coach] Magnus [Norman] and knew what to expect. He is a great player. He has some great shots. He’s feeling the ball well. It was a tough match, as I expected. But I think I’m quite happy to have won in three sets.”

Wawrinka now awaits resurgent Brit Daniel Evans, who continued his strong run of form with a 6-4, 6-4, 5-7, 6-2 upset of 19-year-old and 27th seed Alexander Zverev. Evans has won eight of his past nine matches, including a title run at the $100k ATP Challenger Tour event in Aptos, U.S.A. He will face Wawrinka for the first time.

Evans, who denied 11 of 14 break points faced, while converting six of 14 of his own, was made to work in beating the Emirates ATP Star of Tomorrow. The German teen battled to force a fourth set, taking his seventh set point in the third. But Evans would prove to be too strong in the end, breaking for 2-1 in the fourth and again for 5-2, before closing out the win after three hours and nine minutes. He reaches a second straight third round at a Grand Slam, having advanced as far two months ago at Wimbledon.

“It was probably my best win, [considering] the situation and circumstances,” said Evans. “It was late and difficult mentally. To come back in the fourth and get on top was good. I was a bit passive [in the third set]. He took control. It was pretty evident that’s what he was going to do for the rest of the match. I needed to stay on top of him.”

Where one #NextGen star failed to reach the third round, another succeeded, as American hopeful Jared Donaldson cruised past Viktor Troicki 7-5, 6-3, 6-3. Donaldson, who is projected to crack the Top 100 of the Emirates ATP Rankings for the first time, followed up a first-round upset of David Goffin with a two-hour and 17-minute victory over Troicki. The Rhode Island native is the youngest American to reach the third round at the US Open since 18-year-old Donald Young did so in 2007.

“I’ve been playing well this summer,” said Donaldson. “I’ve also had kind of an average beginning of the year. I’m fortunate that I’ve been able to play so well through the hard courts. It’s really special to be able to culminate the summer and play really well at this event.

“I remember coming here when I was 12. It was really cool to watch all the best players in the world play here. Now I’m thankful that I’m one of those players now.”

One of four Americans in the third round, along with John Isner, Jack Sock and fellow qualifier Ryan Harrison, Donaldson will next face big-serving Croatian Ivo Karlovic. Karlovic polished off Donald Young 6-4, 7-6(4), 6-4 on Thursday, firing 24 aces in total.