The 1989 U.S. Men's Clay Court Championships was a Grand Prix men's tennis tournament held in Charleston, South Carolina in the United States. It was the 21st edition of the tournament and was held from May 8 to May 15, 1989. Sixth-seeded Jay Berger won the singles title.
See main article: 1989 U.S. Men's Clay Court Championships – Singles. Jay Berger defeated
Lawson Duncan 6–4, 6–3
See main article: 1989 U.S. Men's Clay Court Championships – Doubles. Mikael Pernfors /
Tobias Svantesson defeated
Agustín Moreno /
Jaime Yzaga 6–4, 4–6, 7–5