Answer
Łukasz Kubot has won 27 doubles titles on the ATP Tour. He has won four Grand Slam titles in men's doubles, all with Marcelo Melo, at the 2014 French Open, 2017 Wimbledon Championships, 2018 Wimbledon Championships and the 2019 French Open. He has also won a Masters 1000 title in doubles, at the 2016 Paris Masters.