Stefani Lineva was found lying in the middle of Route 434 in Binghamton, New York, at 2 a.m. Saturday.
She was taken to the hospital where she was pronounced dead a short time later.
Officials said Lineva's injuries are consistent with being struck by a car.
Binhamton University's president posted a heart-felt message to staff and students on social media Sunday:
She was a member of the Binghamton University tennis team.
Anyone with information about the incident is asked to contact the Binghamton Police Detective Bureau at 607-772-7080.