Bernard Tomic was the defending champion, but he did not defend his title as he had stopped playing junior tournaments in 2010, despite still being eligible to do so as a 1992 birth.
Jack Sock, who received a wildcard into the singles main draw, won this tournament after defeating his compatriot, tenth-seeded Denis Kudla, in the final.
Daniel Berta was the defending champion, but he lost in the first round against Junior A. Ore. Agustín Velotti won the title after defeating Andrea Collarini in the final, 6–4, 7–5.
Milos Raonic defended his title, defeating unseeded Denis Istomin in straight sets in the final.
John Isner was the two-time defending champion, but withdrew from the tournament because of a hip injury. Jürgen Melzer won the title, defeating Gaël Monfils in the final, 6–3, 2–1, ret.
Tennis singles was an event at the 2014 Sacramento Challenger, the tenth and penultimate instance of the annual Sacramento Challenger tennis tournament.
Tennis singles was an event at the 2014 Knoxville Challenger, the eleventh iteration of the annual Knoxville Challenger professional tennis tournament. Tim Smyczek was the defending champion, but he lost to Sam Groth in the semifinals. Adrian Mannarino won the tournament, defeating Sam Groth 3–6, 7–6(8–6). 6–4 in the final.
Novak Djokovic defeated Tomáš Berdych in the final, 7–5, 4–6, 6–3 to win the singles tennis title at the 2015 Monte-Carlo Masters. It was his second Monte-Carlo Masters title, and he became the first man to win the first three ATP Tour Masters 1000 titles of the season.
Andy Murray defeated Novak Djokovic in the final, 6–4, 4–6, 6–3, to win the men's singles tennis title at the 2015 Canadian Open. It was Murray's first win against Djokovic since the 2013 Wimbledon final, having lost eight consecutive matches to him in that span.
Defending champion Roger Federer defeated Novak Djokovic in the final, 7–6(7–1), 6–3 to win the men's singles tennis title at the 2015 Cincinnati Masters. He won the title without losing a set or having his serve broken for the second time, after 2012. It marked the first time Federer defeated the world No. 1 and No. 2 players in consecutive matches en route to a title. It was Djokovic's fifth runner-up finish without winning the title; he would eventually do so in 2018.
Defending champion Roger Federer defeated Rafael Nadal in the final, 6–3, 5–7, 6–3 to win the singles tennis title at the 2015 Swiss Indoors. This was Federer's tenth consecutive final at the event.
Three-time defending champion Kei Nishikori successfully defended his title, defeating Taylor Fritz in the final, 6–4, 6–4 to win the singles title at the 2016 Memphis Open. Notably, this was only Fritz' third career event on the ATP Tour.
Novak Djokovic defeated the defending champion Andy Murray in the final, 6–2, 3–6, 6–3, to win the men's singles tennis title at the 2016 Madrid Open. It was Djokovic's second title in Madrid and his record 29th ATP Masters 1000 title.
This was the first edition of the tournament. Karen Khachanov won his first ATP World Tour title, defeating Albert Ramos Viñolas in the final, 6−7(4−7), 7−6(7−3), 6−3.
Kei Nishikori was the four-time defending champion, but chose to compete in Buenos Aires instead.
Roger Federer defeated Stan Wawrinka in the final, 6–4, 7–5 to win the men's singles tennis title at the 2017 Indian Wells Masters. It was his record-equaling fifth Indian Wells title, 25th ATP Tour Masters 1000 singles title, and 90th singles title overall. He did not lose a single set in the entire tournament.
Lucas Pouille was the defending champion, but lost in the semifinals to Milos Raonic.
Novak Djokovic defeated Roger Federer in the final, 6–4, 6–4 to win the men's singles tennis title at the 2018 Cincinnati Masters. With the win, he became the first player to complete the career Golden Masters in singles.
Novak Djokovic defeated Borna Ćorić in the final, 6–3, 6–4 to win the singles tennis title at the 2018 Shanghai Masters. It was his record fourth Shanghai Masters title, and 32nd Masters 1000 title overall. He did not lose a single set and did not have his serve broken throughout the entire tournament.
The men's singles of the 2021 I.ČLTK Prague Open tournament was played on clay in Prague, Czech Republic.
Hubert Hurkacz was the reigning champion from when the tournament was last held in 2019, but chose not to participate this year.
Aslan Karatsev defeated Andy Murray in the final, 6–3, 6–3 to win the men's singles title at the 2022 Sydney Tennis Classic. This was Murray's first ATP final since he won the 2019 European Open.
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Jack Sock 
