To compare the on-court emotions of Kevin Anderson from a few years ago to the 2017 edition of Anderson is to question if you’re watching the same 6’8” big-serving right-hander.

A few years ago, a show of emotion from Anderson was the crumpling of his hand into a fist. No shouting. No jumping. The South African barely talked out loud to himself.

But this season, the 31 year old has unveiled a completely different side of himself, and to great success. The veteran says “Come on” multiple times a game. He shouts at his box with excitement throughout the match, and frequently pumps his fist to help him stay focused on every point.

The moment hardly matters: Anderson yells at himself after a regular service winner at 1-1 in the first set, or after an overhead smash in the middle of a third-set tie-break.

It’s all part of his team’s plan to help him stay in the moment and celebrate the good that he’s doing on court. In the past, Anderson had a tendency to become too analytical and think too often during matches. His focus would wane, and points and games would trickle past him.

“I’ve always been pretty critical by nature about my game, and sometimes I feel that I’m maybe going a little bit too far, always thinking of little things I can do better,” Anderson exclusively told ATPWorldTour.com.

But by accentuating the positives, Anderson and his team hope to narrow his focus on only what’s going right.

“It’s a work in progress. Obviously he’s very, very pumped up and vocal about it right now,” said Neville Godwin, who’s coached Anderson since February 2014, and worked with psychologist Alexis Castorri on the idea. “It seems to be working because he’s been playing great.”

Anderson employed the rowdier game at the Barcelona Open Banc Sabadell in April, reaching the third round before falling to eventual champion Rafael Nadal. But it was on the hard courts in the U.S. where his season – and his noisier style – hit full stride.

Anderson reached his third ATP World Tour 500 final at the Citi Open in Washington, D.C., in early July before falling to German Alexander Zverev. At the ATP World Tour Masters 1000 event in Montreal, Anderson made the quarter-finals, again coming up short against eventual champion Zverev.

But perhaps the biggest evidence of success from Anderson’s newfound emotional game came during his breakout US Open. Placed in a wide-open bottom half of the draw, Anderson took full advantage, winning six consecutive matches at a tournament for the first time.

Read More: Anderson Reaps Rewards On Long Way Back

The right-hander dismissed #NextGenATP Croatian Borna Coric, who had upset Zverev in the second round. Anderson avenged his Wimbledon loss to Sam Querrey in the quarter-finals.

To reach his first Grand Slam final, the South African came back from a set down to beat Spain’s Pablo Carreno Busta. He celebrated with his memorable march into the Arthur Ashe Stadium stands.

“I feel like it allows me to play better tennis,” Anderson said of his more emotional self at the US Open. “The faster you can reset after a point that maybe hasn’t gone your way, maybe a missed opportunity, definitely the better. When you’ve played a good point, acknowledging that also has a lot of positive effects that increase your confidence level.”

The on-court change also came about because of a much-less celebrated time in Anderson’s career. Last year, he spent much of the season as a footnote on draw sheets.

Left knee, right shoulder, ankle and groin injuries forced Anderson to retire from two matches and withdraw from nine events. He started 2017 the same way, missing the Australian Open.

But the months away gave Anderson time to think about what’s worked in his career, what’s helped him bring his best tennis. He thought of past matches, including his 2015 US Open breakthough against Andy Murray, during which Anderson ended a 0-7 record in fourth-round matches at Grand Slams.

Serving at 5-6 in the third set, Murray lobbed Anderson, but he chased down the lob, pivoted around the ball and, while leaping in the air, smacked a forehand winner to roars from the packed Louis Armstrong Stadium. Anderson closed his fist and punched at the air as fans screamed.

It was a rare but natural reaction from Anderson, who was playing off of the crowd and living in the moment. “You don’t see that reaction from Anderson, almost never,” said commentator Jimmy Arias during the match.

The fourth-round match stands out to Anderson as a time when more emotions meant better tennis. “Looking back at past matches, when I’ve played my best tennis I have been a little bit more emotional, vocal,” Anderson said.

The change has taken time. The shouting was initially tiring for Anderson, but, as he’s played more matches, he’s felt more comfortable with it.

And, as his coach explains, the best tennis players force themselves away from what’s comfortable so they can experience something better. Nadal, for instance, one of Anderson’s idols and peers, remains a quiet and private person off the court but a gregarious and intense player in between the lines.

“In order to move up in tennis you have to do things differently. The old adage, if you keep doing the same things and expecting a different result, you’re an idiot,” Godwin said. “[Kevin has] always been someone who prides himself on working hard and improving, and this is just another step on that journey.”

The 2017 journey might include another first-ever stop later this year. With his US Open final run, Anderson has surged into contention to make his debut at the Nitto ATP Finals, the prestigious season-ending tournament, to be held 12-19 November at The O2 in London.

Anderson enters the Shanghai Rolex Masters in 12^th place, 250 points behind Carreno Busta, who is in ninth place but holds the last qualification spot, with Stan Wawrinka (seventh) out for the season because of injuries.

“It would be great… Looking back at the summer, I have had some really good results. I’ve put myself in contention. There are a few other guys also in contention,” Anderson said. “It will be a fight to the finish, but I missed out on it by a couple of spots a couple years ago, so I think that will definitely be one of my biggest goals for the rest of the year.”

Alexander Zverev has enjoyed an amazingly successful year on the ATP World Tour. But if you ask him, he still has plenty left to achieve.

While many players may be starting to fatigue physically and mentally from the rigours of the season, the 20-year-old German, who last week clinched his spot in the Nitto ATP Finals, says he has more in the tank.

“I’m going to go out there, I’m going to try my best, play every match, you know, full and we’ll see how it goes,” Zverev said. “I’m ready for the upcoming events. I’m ready for this one. I’m ready for the next big ones in Europe, and obviously London, as well.”

After a disappointing second-round loss at the US Open against #NextGenATP Croatian Borna Coric, Zverev put in a training block to prepare for what he expects to be a strong end to 2017.

“I had five days off of doing nothing, and then I did ten days of just physical [training]. I did kind of a mini-offseason, actually,” said Zverev, who lifted weights and completed track sessions. “I didn’t put down the racquet for too long. I would have had five days no matter what I did at the US Open. I just used it for training. I was still home, still enjoying Monaco a little bit. I was still at the sea and that helps mentally, as well.”

That can only be good news for the fourth-ranked player in the Emirates ATP Rankings, Zverev, who is tied for second on tour with Roger Federer at five titles. World No. 1 Rafael Nadal won his sixth last week at the China Open, where Zverev advanced to the semi-finals (l. Kyrgios).

But while Zverev became the youngest player to qualify for the Nitto ATP Finals since Juan Martin del Potro in 2008, some will point to his results at the Grand Slams. His best finish was at Wimbledon, where he lost in the Round of 16. Zverev has faced tough competition at every Grand Slam.

“I didn’t lose bad Grand Slam matches, apart from the US Open. US Open I think was bad for me. I think I played bad,” Zverev admitted. “Apart from that, you know, I lost to Rafa five sets in Australia. I lost to Milos [Raonic in] five sets at Wimbledon, who was the finalist the previous year. You know, even in Roland Garros I felt like Fernando Verdasco played a good match against me.”

Those losses do not take away from what Zverev has done in 2017, winning two ATP World Tour Masters 1000 titles (Rome and Montreal), with the opportunity for another this week at the Shanghai Rolex Masters, where the right-hander is the third seed.

“I think Shanghai is one of the best Masters that we have,” Zverev said. “I think maybe [it] is the second-best Masters after Indian Wells, even.”

It is an opportunity for Zverev to become the only player on tour to win three Masters 1000 events this year, with an even greater chance looming in London.

“Obviously I’m waiting for the breakthrough. Not waiting; I’m doing a lot of stuff for it. I’m practising, working hard,” Zverev said. “I’m sure it will come. I’m very, very sure about it.”

Any hopes the defending Shanghai Rolex Masters finalist had of qualifying in the Race To London are in jeopardy after Hyeon Chung ousted ninth-seeded Roberto Bautista Agut, 6-4, 6-3 on Monday.

The #NextGenATP Korean equalled the best win of his career with his victory over the No. 13 in the Emirates ATP Rankings (also d. No. 13 Goffin in Montreal) in his first ATP World Tour match since the US Open. Chung was never truly threatened against Bautista Agut, only facing three break points in the match, all of which he saved in the same game in the second set. He broke Bautista Agut three times, including in his final two service games to close out the match.

For Bautista Agut, it was a major blow to his chances of qualifying for the Nitto ATP Finals. He entered the week in Shanghai at No. 16 in the Race, 825 points behind David Goffin in eighth. Last year, the Spaniard beat then-No.1 Novak Djokovic en route to his first ATP World Tour Masters 1000 final (l. Murray).

It was an important win for Chung, who entered the tournament outside the cut in the Race To Milan. The 21 year old was eighth in the standings, just 22 points behind Daniil Medvedev for the seventh and final automatic spot. But since the Russian lost his opening-round match against No. 15 seed Lucas Pouille, Chung will leapfrog him in the Race.

Chung was not the only #NextGenATP player to claim a triumph on Monday, as American qualifier Frances Tiafoe upset World No. 37 Benoit Paire, 6-4, 6-4. The 19 year old broke the Frenchman to start the match, but after giving it right back did not face a break point throughout the rest of the match.

Tiafoe currently sits in ninth in the Race To Milan, and will remain 123 points behind Chung after both players advanced to the second round.

In an all-#NextGenATP match, qualifier Stefanos Tsitsipas upset World No. 42 Karen Khachanov, 7-5, 6-3. It was a dominant performance by the Greek 19 year old, who did not face a break point in the match while taking advantage of two of his four opportunities to earn his first ATP World Tour Masters 1000 main draw victory.