Stéphane Bonneau (born December 8, 1961) is a former professional tennis player from Canada. Bonneau had a career singles win–loss record of 6–18 in ATP tour events. His best result was a third round appearance in the 1985 Player's Canadian Open where he defeated Tomáš Šmíd and Jakob Hlasek. His career singles best ranking was World No. 107, which he attained on July 28, 1986. 1980, 1981 Bonneau first competed in the Player's International Canadian Open in 1980, losing 0-6, 7-6, 1-6 to Tim Gullikson. In doubles action he and partner Rick Fagel lost in the first round to the Chilean brother duo of Álvaro Fillol and Jaime Fillol, 2-6, 6-7. Bonneau's next professional tour level tournament was the 1981 edition of the tournament, in which he lost in the first round again in singles, as a wild card entry, this time to Frenchman Bernard Fritz 4-6, 1-6. (He did not compete in doubles.) 1983, 1984 Again Bonneau did not play in another tour event for another two years, until the 1983 edition of the Player's International. This time he made the second round, defeating compatriot and qualifier Dale Power 6-2, 7-6, before succumbing to No. 2 seed Ivan Lendl 2-6, 1-6. Bonneau turned professional in 1984 after winning the NAIA singles title at Belhaven College. In April, he competed in both singles and doubles at the Montreal Indoor Challenger, losing in the first round in singles to Matt Mitchell 4-6, 3-6, and reaching the second round (quarters) in doubles, partnering compatriot Martin Dyotte. In August, Bonneau played his fourth Player's International, again as a wild card entrant, and lost in the first round in singles, to qualifier Andy Kohlberg, 6-2, 4-6, 4-6. In doubles he and partner Dyotte lost in the first round as well, 4-6, 2-6, to the duo of Francisco González and John Sadri. 1985 Bonneau continued his run of contesting Canadian-only tournaments competing in the Toronto Indoor Grand Prix in February, losing in the first round in singles to Mike Leach in two tie-breaks, and not competing in doubles. A month later, he reached the quarter-finals for the first time in a tour event, the Montreal Indoor. He beat fellow wild card Doug Burke and then David Dowlen in straight sets before losing to eventual champion Kohlberg 2-6, 5-7. In doubles, he and compatriot Josef Brabenec lost in straight sets in the first round to South