Manuel Diaz (born San Juan, Puerto Rico) is the long-time head tennis coach at the University of Georgia.

He has coached the Bulldogs to four NCAA championships, in 1999, 2001, 2007, when John Isner headed the team, and 2008.

He has also lead the program to its only two Intercollegiate Tennis Association Team Indoor National Championships, winning it in back-to-back years in 2007 and 2008.

He is holds the all-time SEC wins record with 767 victories as the head coach.

He is married to the former Suzanne Rondeau of Toronto, Canada, and they have three sons - Alex, Eric and Manuel III.