John-Patrick Tracey "JP" Smith is an Australian professional tennis player who competes on the ATP Tour, specializing in doubles. He attended the University of Tennessee from 2007 through 2011 where he was a four-time All-American and made it to the college No. 1 ranking in both singles and doubles. Smith reached his highest ATP singles ranking of No. 108 on 28 September 2015, and his highest ATP doubles ranking of No. 52 on 11 September 2017.

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.