Guillaume Rufin/ɡilˈloʊmruːˈfɑːn/ (born 26 May 1990) is a professional French tennis player. His highest ranking so far has been world no. 81, which he achieved on 9 September 2013. He received a wildcard into the 2009 French Open, his ATP-tier debut. In the first round, one day before his 19th birthday, he beat Eduardo Schwank, 6–1, 6–3, 6–3.
Rufin achieved another landmark in his young career on 25 October 2009 when he won the Florianapolis Challenger title in Brazil, beating Pere Riba in the final 6–4, 3–6, 6–3.
Won tournament; or reached Final; Semifinal; Quarter-final; Round 4, 3, 2, 1; competed at a Round Robin stage; lost in Qualification Round; absent from tournament event; played in a Davis Cup Zonal Group (with its number indication) or Play-off; won a bronze, silver (F or S) or gold medal at the Olympics; a downgraded Masters Series/1000 tournament (Not a Masters Series); or a tournament that was Not Held in a given year.
To avoid confusion and double counting, these charts are updated either at the conclusion of a tournament, or when the player's participation in the tournament has ended.