Top 10 stars Casper Ruud and Holger Rune were both involved in four-set matches Monday at the US Open but only Ruud survived his first-round test at the hard-court major in New York.

The 2022 finalist Ruud held off home qualifier Emilio Nava 7-6(5), 3-6, 6-4, 7-6(5) on Court 17 at Flushing Meadows for his 200th tour-level victory. The fifth seed overcame an uber-aggressive performance from the 21-year-old Nava, who struck a remarkable 72 winners to Ruud’s 27 but was unable to find the consistency required to pull off an upset.

Aware of his opponent’s desire to dictate, Ruud stayed cool and offered up just 21 unforced errors to Nava’s 49 across the four sets. That approach was particularly key in the tie-breaks he won in the first and fourth sets, as Ruud’s greater experience told under pressure.

Ruud is now 10-5 at the US Open, where he fell to Carlos Alcaraz in last year’s championship match. His next opponent as he seeks another deep run at Flushing Meadows will be Zhang Zhizhen, after the Chinese star defied a J.J. Wolf comeback for a 7-5, 7-5, 6-7(5), 4-6, 6-3 first-round win.

Roberto Carballes Baena earlier engineered the first major upset of the fortnight in New York as the World No. 63 defeated fourth seed Rune 6-3, 4-6, 6-3, 6-2.

Carballes Baena broke Rune seven times on Court 5 as he registered his first Top 10 win at the 14th attempt in two hours, 42 minutes. He stayed rock-solid against a visibly frustrated Rune, who has now lost four straight tour-level matches stretching back to his quarter-final defeat to Carlos Alcaraz at Wimbledon.

A STUNNING WIN 👏

The moment @Robertocarba93 secured the first Top 10 win of his career!

🎥 @usopen | #USOpen pic.twitter.com/NEK6GiRocf

— ATP Tour (@atptour) August 28, 2023

The 30-year-old Carballes Baena made just 21 unforced errors to Rune’s 43, frugality which kept the Dane under constant pressure throughout the pair’s first meeting since Wimbledon. Rune was a straight-sets winner at SW19 but could not raise his level consistently enough in Monday’s clash in New York to prevent Carballes Baena taking a 2-1 Lexus ATP Head2Head series lead against the World No. 4.

Now into the second round for the fifth time in six main-draw appearances at Flushing Meadows, Carballes Baena next faces Jiri Lehecka or Aslan Karatsev as he looks to reach the third round for the first time.

Frances Tiafoe made a fast start at the US Open Monday, where he moved past American wild card Learner Tien 6-2, 7-5, 6-1 to reach the second round.

The 10th seed Tiafoe enjoyed a standout run to the semi-finals on home soil in New York last year, defeating then-Top 10 stars Rafael Nadal and Andrey Rublev before falling to champion Carlos Alcaraz. Competing on Arthur Ashe Stadium again, Tiafoe quickly found his range to entertain the American fans.

“I really love this court, I really enjoy playing here. It hasn’t been the best summer for me, but I love playing on this court,” said Tiafoe, who went 1-2 at ATP Masters 1000 events in Toronto and Cincinnati in August. “I just want to come and do really well. The last time I played here was one of the toughest losses of my life. To come back out here and play as well as I did and take care of business is nice.

“I am leaving everything I’ve got. If I die out here, I die out here. I have to put it all on the line and hopefully it is good enough.”

The 25-year-old broke lefty Tien’s serve seven times, struck 37 winners and showed good touch around the net to advance after two hours and nine minutes.

Tiafoe, who is competing at a career-high No. 10 in the Pepperstone ATP Rankings, will next play Austrian Sebastian Ofner after the World No. 58 beat Nuno Borges 7-6(5), 3-6, 7-6(7), 6-4.

The three-time tour-level titlist Tiafoe has now won his past 17 matches against left handers, dating back to 2021, when he fell against Liam Broady in Eastbourne.

Tiafoe’s countryman Ben Shelton also advanced. The 20-year-old, currently fifth in the Pepperstone ATP Live Race To Jeddah, defeated Pedro Cachin 1-6, 6-3, 6-2, 6-4 to set a second-round meeting against former champion Dominic Thiem.

Taylor Fritz ensured both Top 10 American stars advanced to the second round in New York. The World No. 9 Fritz moved past countryman Steve Johnson 6-2, 6-1, 6-2 in 81 minutes.

Fritz suffered a shock first-round defeat against Brandon Holt at the US Open last year, but produced a dominant display against Johnson to ensure he would not fall at the first hurdle again. The 25-year-old won 100 per cent (23/23) of his first-serve points and fired 10 aces to earn his 34th tour-level win of the year. He will next play Miomir Kecmanovic or Juan Pablo Varillas.

Fritz is chasing his maiden major this fortnight. The biggest trophy he has clinched on Tour was at the ATP Masters 1000 event in Indian Wells in 2022.

American 14th seed Tommy Paul, who is up to a career-high No. 11 in the Pepperstone ATP Live Rankings, needed four sets to defeat Italian qualifier Stefano Travaglia 6-2, 6-3, 4-6. 6-1. He next meets Wimbledon quarter-finalist Roman Safiullin.

Sebastian Korda, the 31st seeded American, lost a tough five-setter to Marton Fucsovics 7-6(4), 4-6, 7-6(1), 4-6, 6-4 one week after taking out the Hungarian at the Winston-Salem Open. Korda came into the US Open with an ankle injury, which forced him to withdraw from his scheduled semi-final in Winston-Salem without hitting a ball.

World No. 45 American J.J. Wolf also bowed out in five sets, falling 7-5, 7-5, 6-7(5), 4-6, 6-3 to China’s Zhang Zhizhen.

#NextGen ATP American Ben Shelton rallied from a set down to defeat Argentine Pedro Cachin 1-6, 6-3, 6-2, 6-4.

Next Gen ATP Finals alumni Sebastian Baez and Jiri Lehecka enjoyed strong runs at the Winston-Salem Open to earn themselves a pre-US Open boost in the Pepperstone ATP Rankings.

ATPTour.com looks at the movers of the week in the Pepperstone ATP Rankings as of 28 August 2023.

No. 29 Jiri Lehecka, +6 (Career High)
The 21-year-old Lehecka fell just short of his maiden ATP Tour crown in Winston-Salem but has nonetheless risen to a career-high No. 29. The Czech, who also reached the final at the 2022 Next Gen ATP Finals, defeated the in-form Max Purcell en route to the championship match at the ATP 250 before falling to Baez.

No. 23 Borna Coric, +6
The top seed in Winston-Salem, Coric’s run to his third tour-level semi-final of the season has boosted his chances of a swift return to the Top 20 after he dropped out last week. Baez edged the Croatian in a deciding tie-break to claim a three-hour, 19-minute last-four epic in North Carolina, but Coric will be happy to have gathered some momentum ahead of his US Open campaign.

No. 31 Sebastian Korda, +2
There was a bittersweet end for Korda in Winston-Salem, where the American saved match point to down Richard Gasquet in the quarter-finals but was then forced to withdraw from the event due to an ankle injury sustained during his win against the Frenchman. Korda earlier dispatched Benjamin Bonzi and Marton Fucsovics in straight sets at the ATP 250, and next faces a rematch with the latter in the US Open first round.

No. 32 Sebastian Baez, +10
The 22-year-old Baez became just the fourth player to win at least three tour-level titles this season with his Winston-Salem triumph, joining Carlos Alcaraz (6 titles), Daniil Medvedev (5) and Novak Djokovic (4) on that list. The Argentine showed few signs of fatigue after his semi-final marathon with Coric, easing past Lehecka in the championship match to extend his winning streak to 10 matches.

No. 43 Max Purcell, +4 (Career High)
Australia’s Purcell backed up his quarter-final run in Cincinnati with another last-eight appearance in Winston-Salem. The 25-year-old upset second seed Tallon Griekspoor in the third-round for his 11th win (including qualifying matches) in August. Although Lehecka proved too strong in the quarter-finals, Purcell has risen four spots to a career-high No. 43.

Other Notable Top 100 Movers
No. 24 Tallon Griekspoor, +1 (Career High)
No. 55 Richard Gasquet, +2
No. 68 Brandon Nakashima, +4
No. 75 Dominik Koepfer, +3
No. 85 Yosuke Watanuki, +3 (Career High)
No. 89 Michael Mmoh, +5
No. 93 Juan Manuel Cerundolo, +7

Kei Nishikori withdrew from the US Open on Sunday due to injury, the tournament announced.

The former World No. 4 withdrew from other tournaments earlier this North American hard-court swing due to a left knee injury. 

Nishikori in June returned to action for the first time since October 2021. The Japanese star immediately found his form, winning an ATP Challenger Tour title at Palmas del Mar. After competing in two more Challenger events, he reached the Atlanta quarter-finals. But Nishikori has not competed since and now will have to wait to make his return to Grand Slam action. 

The 33-year-old will be replaced in the draw by Australian James Duckworth, who will take on Brazilian Felipe Meligeni Alves in the first round.

One year ago, Frances Tiafoe enjoyed his breakthrough moment. Having never advanced past the fourth round at the US Open, the American rallied the support of the New York fans — and many throughout the world — to help push through to the semi-finals.

Tiafoe stunned Rafael Nadal and upset Andrey Rublev before pushing eventual champion Carlos Alcaraz to five sets in one of the most memorable matches of the season. His journey during the fortnight was documented in Netflix’s Break Point.

The ATP recently caught up with Tiafoe’s longtime girlfriend, Ayan Broomfield, to speak about the experience of filming for a docuseries and Tiafoe’s unforgettable tournament in New York.

“That two-week period completely changed his life, changed my life, changed his whole family’s life. It was magical,” Broomfield said. “I think when people actually understand what it took for him to actually get there financially, and just his story, I think people understand that it was more than just a tennis match. It’s literally a dream come true.

“I think his story being told in this kind of setting was kind of like a storytelling setting was amazing. And people really got to see Frances for who he actually is and what he brings to the sport.”

Watch Break Point Reunion:

One of the most fun moments of Tiafoe’s episode was when cameras took fans behind the scenes of the American’s ride back to Manhattan with his team after he upset Nadal in the fourth round.

“That was definitely a fun moment. Obviously beating one of the greats of tennis, you’re going to be super excited. But Frances is just the most happy guy. He’s so happy-go-lucky. And I think for me, I’m more of a balance of happy and kind of just serious,” Broomfield said. “I think we balance each other out a lot. And his team, I think we’re all trying to focus on maybe getting him a little bit more calm so he can focus a little bit more throughout his matches.

“But any time Frances does anything, we’re all just so happy for him, and we can’t contain it. So that’s literally how we are 95 per cent of the time, our team.”

Not only did Netflix bring fans closer to Tiafoe’s tennis success, but his background story. With parents from Sierra Leone, Tiafoe was introduced to tennis because his father was a maintenance worker at the Junior Tennis Champions Centre in College Park, Maryland.

According to Broomfield, there was a scene back home that did not make the cut.

“There was one scene that I think would have been really, really interesting for people to see about Frances. I think we did one scene at his old home and it was kind of in a lower-income area,” Broomfield said. “He actually got pretty emotional and was talking about kind of where he came from and his story a little bit more. And I think it would have been really interesting for people to see visually where he started and where he is now. But I think they did a really good job telling his story anyway.”

People might not know that Broomfield was a top college tennis player at Clemson University and then UCLA. She cracked the Top 500 of the WTA Rankings.

“We can talk about tennis. I mean, I played tennis myself. So even just when we’re seeing the draw, and we kind of look at certain players, sometimes I can act as a sounding board for matches,” Broomfield said. “Not to say that he takes my advice, but it’s nice to be able to chat about it and strategy. I just feel like we just understand it and what it takes for someone to go and be able to compete at the highest level.”

Broomfield was happy with the experience they had filming Break Point.

“I thought it was going to be a little bit more overwhelming. But they blended in super well. I felt very comfortable. It was just as if they weren’t even there at all,” Broomfield said. “And then after watching it all back, I think it was just really fun to see how we interacted with each other. I think in the moment you don’t really see kind of how you are. But after it was fun to watch, I enjoyed it.”

Now, one year after the moment that was featured in the show, Tiafoe is back in New York for the US Open. The American will play countryman Learner Tien on Monday in the first round.