Samuel Austin Querrey is an American professional pickleball and former tennis player. He reached a career-high singles ranking of world No. 11 achieved on February 26, 2018, and won ten ATP singles titles. Known for his powerful serve, Querrey holds the record for consecutive service aces in a match with 10. He was also a capable doubles player, with five ATP doubles titles and a career-high doubles ranking of No. 23 achieved on May 17, 2010.

Sir Andrew Barron Murray is a British professional tennis player. He was ranked world No. 1 in singles by the Association of Tennis Professionals (ATP) for 41 weeks, and finished as the year-end No. 1 in 2016. Murray has won three Grand Slam singles titles, two at Wimbledon and one at the US Open, and has reached eleven major finals. Murray was ranked in the top 10 for all but one month from July 2008 through to October 2017, and was no lower than world No. 4 in eight of the nine year-end rankings during that span. Murray has won 46 ATP Tour singles titles, including 14 Masters 1000 events and two gold medals at the Summer Olympics.