Gilles Simon is a French professional tennis player. He was born on December 27 1984 in Nice. He turned pro in 2002 and his highest ranking ever, as of 2007 is 29th. In 2006 he reached the final of the Valencia Open. In 2007 he won the Marseille Open, his first ATP Tour title, and then in September, he won his second title in Romania.

Gilles Simon is the French head of the Ferrari Formula One team's Engine Department.