Gilles Müller is a Luxembourgish former professional tennis player. He is a two-time major singles quarterfinalist, making him by far the most successful male tennis player in Luxembourgish history. Müller won two titles on the ATP Tour and achieved a career-high ATP singles ranking of world No. 21 on 31 July 2017. He was known for his powerful left-handed serve and net skills. Following his retirement, Müller was appointed as Luxembourg's Davis Cup team captain.

Rafael Nadal Parera is a Spanish professional tennis player. Nadal has been ranked world No. 1 in singles by the Association of Tennis Professionals (ATP) for 209 weeks, and has finished as the year-end No. 1 five times. Nadal has won 22 Grand Slam men's singles titles, including a record 14 French Open titles. He has won 92 ATP-level singles titles, including 36 Masters titles and an Olympic gold medal, with 63 of these on clay courts. Nadal is one of only two men to complete the Career Golden Slam in singles. His 81 consecutive wins on clay constitute the longest single-surface win streak in the Open Era.