Conor Pollock, 24, was arrested by Atlanta police Saturday and was placed on administrative leave Monday by Georgia Tech, The Atlanta Journal-Constitution reported.
Police said Pollock approached a 23-year-old woman leaving an Atlanta bar and invited her to his apartment, and she and a female friend went.
The victim told police she remembered being at the apartment and when she awoke, Pollock was raping her, police said.
Pollock was arrested about 6:30 a.m. Saturday, police said. He was also charged with possession of cocaine and marijuana.
In a statement, Georgia Tech said Pollock was put on administrative leave with pay, pending the outcome of the investigation.
Pollock, who replaced former assistant tennis coach Aljosa Piric in August, had run an elite junior tennis program in Austin, Texas, before coming to Tech. He had competed on the ATP circuit for more than a year and played college tennis at Texas A&M where he was a three-time All-American.