Marcelo Fedrizzi Demoliner is a Brazilian professional tennis player. A doubles specialist, he has won five doubles titles. He won his first title at the ATP 250 Antalya Open with Santiago González in June 2018, after having reached six finals at that level. He was runner-up at the ATP 500 Vienna in 2018 and Saint Petersburg in 2020.

Matwé Middelkoop is a Dutch professional tennis player who specialises in doubles. He has won 14 doubles titles on the ATP Tour, most notably the 2022 Rotterdam Open alongside Robin Haase, and reached a career high doubles ranking of world No. 18 on 6 February 2023.