The 14-time Grand Slam champion will become the face of Tommy Hilfiger for two years.
The 20-year-old also joins IMG Models as part of the deal.
The American was spotted working at Saviano's academy in Plantation, Fla.
The American star reached three Wimbledon finals during his career.
Another day, another miracle for Gael Monfils
The 19-year-old will work with both Lindsay Davenport and Wim Fissette in 2015.
The 16-year-old was struck by her father during an argument after a match at a tournament in Israel.
