Keys is first American Evian ambassador.
Two-time French Open champion may not receive Roland Garros wild card.
Hall of Famer heads roster that includes Bouchard, Isner and Fish.
Second seed carries 12-0 Acapulco record into quarterfinals.
The same company that owns the Tennis Channel adds to its tennis portfolio
World No. 1 opposes wild cards for players returning from doping bans.
Former world No. 11 retires at age 29.
