The US Open Series kicked off in Atlanta last week, while the European summer clay swing continued in Gstaad and Umag. While the top seed delighted home fans on the hard courts, some more surprising names shone at all three events as well.

Veterans Pablo Andujar, Dudi Sela, and Juan Monaco have resurgent weeks

It was a great week for veteran players on the ATP World Tour. Pablo Andujar reentered the top 75 with his first title since 2012 in Gstaad, improving his ATP record to an even .500 on the season in the process. His most notable victory came against Fernando Verdasco in three sets in the semifinals. After a slow start to his season, Andujar is now 8-2 in his last 10 matches.

Top Israeli player Dudi Sela provided a welcome bright spot in the news for his country by reaching the final in Atlanta, his first since 2008. Sela raced to the final with some excellent play against a modest field with notable wins over Sam Querrey and Vasek Pospisil. He has found renewed form in Bogota and Atlanta these last two weeks.

Rounding out the trio of refreshed veterans this week is Juan Monaco, the former top-10 player who has now reentered the top 85 with a finals showing in Gstaad, where he fell to Andujar in two sets. The Argentine had a notable win over Guillermo Garcia-Lopez, in a match where he dropped his only set of the tournament before the final. Time will tell if this pack of experienced players can have their runs this week translate into improved results for the rest of the season.

Pablo Cuevas and Benjamin Becker continue recent success

Pablo Cuevas won his first career ATP title in Bastad recently, and he has already doubled his total with a triumph in Umag over Tommy Robredo 6-3 6-4. The top Uruguayan, who had to qualify this week, is now at a career high ranking of No. 40 at the age of 28. His results have been steadily improving, and he has proven himself as a reliable clay-court player.

Benjamin Becker was cranking his forehand and serve this week more impressively than he has in years, according to some eyewitnesses in Atlanta. He’s back in the top 60 at the age of 33 after a semifinal showing there, where he his best win was over Yen-Hsun Lu. Becker built on his momentum from reaching the final of the Dutch Open on grass in June.

John Isner keeps American victory streak alive in Atlanta, while Jack Sock renews successful doubles partnership with Vasek Pospisil

American players have won all five editions of the renewed ATP tournament in Atlanta. John Isner kept that streak alive with his second title in a region he called home during his college years. The former Georgia Bulldog’s victory in the final came over Sela and improved his record to 2-0 this year in ATP finals. Isner also notably got revenge against Jack Sock in the semifinals, after losing to him in Newport just two weeks before.

However, Sock and his partner Vasek Pospisil renewed their success from Wimbledon by claiming the doubles title in Atlanta. Their success is likely the basis for a long-term doubles partnership, since they are both players that prefer faster surfaces.

Viktor Troicki reaches quarterfinals in return from suspension

Viktor Troicki returned from his year-long doping suspension and surprisingly defeated both Dominic Thiem and Andrey Golubev without dropping a set in route to reaching the quarterfinals in Gstaad. He had to beg for a wild card into the tournament, but his showing this week justified it, and the rust seemed to fall off quickly for the former top-15 man from Serbia. Playing with renewed focus and a chip on his shoulder, Troicki could prove to be a dangerous early opponent for some top players the rest of this season, depending on where he can be awarded wild cards or qualify for the main draw.

Borna Coric joins rising ATP young guns with quarterfinal showing

Nick Kyrgios and Alex Zverev are among the rising talents who have impressed in recent months. Borna Coric, a 17-year-old Croatian, has now joined them on the radar of many fans and pundits with a quarterfinal showing in Umag. He has entered the top 200 for the first time in his career after defeating both Edouard Roger-Vasselin and Horacio Zeballos before falling to Fabio Fognini in a competitive three-set match where his inexperience eventually cost him.

 The win over Roger-Vasselin was the first ATP Tour main-draw victory for Coric, and he also has a triumph over Jerzy Janowicz in Davis Cup this season. These rapidly improving young players should form the core of the next generation of ATP professionals who will be dueling for the most prestigious titles in the years ahead.

 Upset of the week: Atlanta R2: Thiemo de Bakker d. Kevin Anderson 6-4 7-5

Lucky loser Thiemo de Bakker shocked defending finalist Kevin Anderson in the early rounds of Atlanta this week, avoiding a tiebreak in either set in the process. De Bakker said post-match that he “cares about tennis now”, while Anderson blamed the loss on rust and not having played a hard-court match since Miami.

De Bakker won more points on his serve than Anderson, in a surprising statistic, and slapped enough returns to generate 13 break-point opportunities against the South African. He converted three of them, and that was enough for the victory.