The 1971 U.S. Clay Court Championships was a combined men's and women's tennis tournament that was part of the 1971 Grand Prix circuit and categorized as a Group B event. The event was held in Indianapolis, USA and played on outdoor clay courts. It was the 3rd edition of the tournament in the Open Era and was held in from August 16 through August 22, 1971. Željko Franulović and Billie Jean King won the singles titles.[1]
Željko Franulović defeated 
Cliff Richey 6–3, 6–4, 0–6, 6–3
Billie Jean King defeated Linda Tuero 6–4, 7–5
Željko Franulović / Jan Kodeš defeated Clark Graebner / Erik van Dillen 7–6, 5–7, 6–3
Judy Dalton / Billie Jean King defeated Julie Heldman / Linda Tuero 6–1, 6–2