1981 U.S. Pro Indoor

The 1981 U.S. Pro Indoor was a men's tennis tournament played on indoor carpet courts. It was a WCT tournament that was part of the 1981 Volvo Grand Prix circuit. The tournament was played at the Spectrum in Philadelphia, Pennsylvania in the United States and was held from January 26 through February 1, 1981. Seventh-seeded Roscoe Tanner won the singles title.

1981 U.S. Pro Indoor
Date	January 26 – February 1
Edition	14th
Category	Grand Prix circuit (WCT)
Draw	48S / 24D
Prize money	$250,000
Surface	Carpet / indoor
Location	Philadelphia, Pennsylvania, U.S.
Venue	Spectrum
Champions
Singles
Roscoe Tanner[1]
Doubles
Marty Riessen / Sherwood Stewart[2]

Finals

Singles

Main article: 1981 U.S. Pro Indoor – Singles

Roscoe Tanner defeated Wojciech Fibak 6–2, 7–6, 7–5

• It was Tanner's only title of the year and the 29th of his career.

Doubles

Main article: 1981 U.S. Pro Indoor – Doubles

Marty Riessen / Sherwood Stewart defeated Brian Gottfried / Raúl Ramírez 6–2, 6–2

• It was Riessen's only title of the year and the 59th of his career. It was Stewart's 1st title of the year and the 30th of his career.