Marcel Granollers Pujol is a Spanish professional tennis player. He reached a career-high doubles ranking of world No. 1 on 6 May 2024 and a singles ranking of No. 19 on 23 July 2012. Granollers has won four ATP singles titles and 25 doubles titles, including the 2012 ATP World Tour Finals. He has also reached five Major doubles finals at the French Open and the US Open in 2014, and at the 2019 US Open, the 2021 and 2023 Wimbledon Championships with Horacio Zeballos.

Horacio Zeballos Jr. is an Argentine professional tennis player. He reached a career-high doubles ranking of world No. 1 on 6 May 2024, and a singles ranking of No. 39 on 4 March 2013. In doubles, he has reached the men's doubles finals at the 2019 US Open and at Wimbledon in 2021 and 2023 alongside Marcel Granollers. In singles, he has reached the fourth round at the French Open, doing so in 2017.