He is a two-time Grand Slam champion in doubles, having won the 2014 Australian Open with Robert Lindstedt, as well as the 2017 Wimbledon Championships with Marcelo Melo.

He then qualified for the Brasil Open, where he recorded his first main-draw win in over one and a half year against Daniel Gimeno Traver, but lost in the following round to Thomaz Bellucci.

However, in the 2009 Serbia Open, he fell in the final round of the qualifying draw, but was granted a lucky loser spot after Steve Darcis withdrew due a shoulder injury.

His next main-draw appearance came in MercedesCup in Stuttgart, where he recorded wins over Pablo Andújar and Philipp Kohlschreiber, but lost to Nicolas Kiefer in the quarterfinals.

They were able to qualify in the 2009 ATP World Tour Finals, falling in the round-robin stage despite winning two matches over the teams of Max Mirnyi and Andy Ram, and Lukáš Dlouhý and Leander Paes, only losing to Bob Bryan and Mike Bryan Kubot started his 2010 campaign in Doha, where he reached the quarterfinals, losing to Viktor Troicki, after recording straight-set wins over Karim Maamoun and Sergiy Stakhovsky.

He then suffered early losses in his next three tournaments to credible players in the 2010 Copa Telmex, losing to Juan Mónaco, in the 2010 Abierto Mexicano Telcel to Fernando Verdasco, and the 2010 BNP Paribas Open to David Nalbandian.

Subsequently, Kubot and Matkowski lost to the eighth seeded Spanish pair of Roberto Bautista Agut and David Ferrer in the second round.

In October, Kubot partnered with Marcelo Melo defeated Oliver Marach and Fabrice Martin to win the Vienna Open Doubles Title for the third time in his career.

Eighth-seeded Łukasz Kubot and Marcelo Melo reached the BNP Paribas Open semi-finals after breezing past tricky wild card duo, Nick Kyrgios and Nenad Zimonjić.

[9] At the 2017 Miami Open Kubot and Melo dropped only three sets en route to the final, defeating Marcus Daniell & Marcelo Demoliner, Jean-Julien Rojer & Horia Tecău, Jamie Murray & Bruno Soares in QF and Daniel Nestor & Brian Baker in SF to reach their second straight ATP Masters 1000 final.

The following month they reached their third ATP World Tour Masters 1000 final of the season after they defeated seventh seeds Ivan Dodig and Marcel Granollers at the Mutua Madrid Open (tennis).

[12] In the Mutua Madrid Open final they defeated French duo consisting of Nicolas Mahut and Édouard Roger-Vasselin to win their second Masters 1000 doubles title this season.

[16] They stayed perfect on the grass courts, ousting top seeds Henri Kontinen and John Peers in the Wimbledon semi-finals.

The Paris victory marks Kubot and Melo's sixth title of the season, after wins at Wimbledon, Miami, Madrid, Halle and s'Hertogenbosch.

[22] At the start of the season top-seeds Łukasz Kubot and Marcelo Melo defeated Jan-Lennard Struff and Viktor Troicki to capture the Sydney International men's doubles title.

Fifth seeds Kubot and Melo advanced to the quarter-finals of the Western & Southern Open for the second year in a row, beating Rogers Cup finalists Raven Klaasen and Michael Venus.

In the quarterfinal Kubot and Melo lost to fourth seeds Jamie Murray and Bruno Soares, who triumphed in Acapulco and Washington, D.C. earlier this season.

[27] Kubot and Melo came into the tournament having lost five of their previous seven matches and also ended up losing to the third-seeded Americans Mike Bryan and Jack Sock in the final.

2 seeds Kubot and Melo beat top-seeded Oliver Marach and Mate Pavić in the China Open final to claim their third team title of the season.

In the Shanghai final they defeated sixth-seeded Jamie Murray and Bruno Soares to continue their strong form and win back-to-back titles.

3 seeds Kubot and Melo secured a spot for the prestigious season-ending event after beating second-seeded Oliver Marach and Mate Pavić in the Rolex Shanghai Masters semi-final.

At the 2019 BNP Paribas Open sixth seeds Łukasz Kubot and Marcelo Melo rallied past Wesley Koolhof and Stefanos Tsitsipas in first round and defeated Nick Kyrgios and Taylor Fritz to reach the quarterfinal.

They battled past Dominic Inglot and Franko Škugor in one hour and 23 minutes and defeated Novak Djokovic and Fabio Fognini for a spot in the final.

The Polish-Brazilian pairing beat American wild cards Nicholas Monroe and Tennys Sandgren to claim the Winston-Salem Open championship, their 13th doubles crown together.

[36] At the China Open Kubot and Melo recorded their sixth straight victory beating Mao-Xin Gong and Ze Zhang to reach the semi-finals.

Without dropping a set throughout the entire tournament the Polish-Brazilian duo defeated Karen Khachanov and Andrey Rublev for a place in the championship match.

The 2015 Vienna champions had not dropped a set en route to their sixth ATP Tour doubles final of the season and had won 16 of their past 19 matches.

[39] At the Nitto ATP Finals Łukasz Kubot and Marcelo Melo made a winning start to Group Jonas Björkman after beating Ivan Dodig and Filip Polášek.

[40] They reached their second team semifinal at The O2 Arena after edging out Rajeev Ram and Joe Salisbury to finish Group Jonas Björkman with a 2–1 record.

[47] At Rotterdam Open third seeds Kubot and Koolhof defeated Ben McLachlan and Kei Nishikori before losing to Jérémy Chardy and Fabrice Martin in the second round.