Jarkko Nieminen was the defending champion, but lost to eventual champion Bernard Tomic in the quarterfinals.
It was Tomic's first ATP title and his first final; he defeated Kevin Anderson 6–3, 6–7(2–7), 6–3 in the final.
Novak Djokovic defeated Roger Federer in the final, 3–6, 6–3, 7–6(7–3), to win the men's singles tennis title at the 2014 Indian Wells Masters. It was his third Indian Wells title.
Novak Djokovic defeated Rafael Nadal in the final, 6–3, 6–3 to win the men's singles tennis title at the 2014 Miami Open. Djokovic completed his second Sunshine Double with the win.
Kei Nishikori defeated Santiago Giraldo in the final, 6–2, 6–2, to win the singles title at the 2014 Barcelona Open. He became the first non-Spanish player to win the tournament since 2002.
Jack Sock defeated Filip Krajinović in the final, 5–7, 6–4, 6–1 to win the singles tennis title at the 2017 Paris Masters. It was Sock's first Masters 1000 singles title, and he became the first American to win a Masters 1000 singles title since Andy Roddick in 2010. For the first time since 2004, more than three of the year's Masters 1000 singles events were won by players outside the Big Four. The win also catapulted Sock from No. 24 in the Race to London to No. 9, which earned him entry to the 2017 ATP Finals. Sock also entered the top 10 for the first time in his career.
Alexander Zverev defeated Dominic Thiem in the final, 6–4, 6–4 to win the men's singles tennis title at the 2018 Madrid Open.
Rafael Nadal defeated Stefanos Tsitsipas in the final, 6–2, 7–6(7–4) to win the men's singles tennis title at the 2018 Rogers Cup. It was his fourth Canadian Open title.
Karen Khachanov defeated Novak Djokovic in the final, 7–5, 6–4 to win the singles tennis title at the 2018 Paris Masters. It was Khachanov's first Masters 1000 title, and he saved two match points en route, in his third round match against John Isner.
Dominic Thiem defeated Roger Federer in the final, 3–6, 6–3, 7–5 to win the men's singles tennis title at the 2019 Indian Wells Masters. It was his maiden ATP Tour Masters 1000 title, and he became the first Austrian to win a Masters title since Thomas Muster won the 1997 Miami Open.
John Isner was the two-time defending champion and had won the title five times in the last six years, but he lost in the second round to Reilly Opelka. This was only the second time out of ten in the Atlanta Open's history that Isner failed to reach the singles final.
Nick Kyrgios defeated Daniil Medvedev in the final, 7–6(8–6), 7–6(7–4) to win the men's singles tennis title at the 2019 Washington Open. Kyrgios saved a match point in the semifinals against Stefanos Tsitsipas.
Roger Federer was the two-time defending champion and successfully defended his title, defeating Alex de Minaur in the final, 6–2, 6–2. The victory made Federer the first player in ATP history to win 10 same tournament titles on two different surfaces.
Defending champion Novak Djokovic defeated Dominic Thiem in the final, 6–4, 4–6, 2–6, 6–3, 6–4 to win the men's singles title at the 2020 Australian Open. It was his record-extending eighth Australian Open title and 17th major singles title overall. With the win, Djokovic also regained the world No. 1 singles ranking. Thiem became the first Austrian player to reach an Australian Open singles final. This was Thiem's third major singles final loss in as many attempts. The match also marked the first time Djokovic came back to win in a major final after trailing two sets to one, having lost each of the last seven times this happened.
Kyle Edmund was the defending champion but chose not to defend his title.
Daniil Medvedev was the defending champion, but chose not to defend his title.
Aslan Karatsev won his first ATP Tour singles title, defeating Lloyd Harris in the final, 6–3, 6–2 to win the men's singles tennis title at the 2021 Dubai Tennis Championships. Karatsev became the second wildcard in the tournament's history to win the men's singles title. Harris was the first qualifier to reach the final of the Dubai Tennis Championships.
Pablo Carreño Busta defeated Jaume Munar in the final, 6–1, 2–6, 6–4 to win the inaugural Men's Singles tennis title at the 2021 Andalucía Open. Notably, this was the first tournament in ATP history to feature 4 semifinalists from the same nation.
Nick Kyrgios was the reigning champion from when the tournament was last held in 2019, but lost in the first round to Mackenzie McDonald.
Cameron Norrie defeated Nikoloz Basilashvili in the final, 3–6, 6–4, 6–1 to win the men's singles tennis title at the 2021 Indian Wells Masters. It was his first ATP Tour Masters 1000 title, and he became the first Briton to win the title. Basilashvili became the first Georgian to reach a Masters-level final since Alex Metreveli in 1968, and the first to do so while representing Georgia as an independent nation.
John Isner was the defending champion, but lost in the quarterfinals to Jenson Brooksby.
John Isner 
