The 1970 International Tennis Players Association Open Indoor[3] or ITPA Open Indoor was an ILTF tennis tournament played on indoor carpet courts.

It was played at the Spectrum in Philadelphia, Pennsylvania in the United States.

It was the third edition of the tournament and was held from February 2 through February 8, 1970.

The men's singles was won by Rod Laver, his second consecutive singles title at the event, and the women's singles was won by Margaret Court Rod Laver defeated Tony Roche 6–3, 8–6, 6–2 Ilie Năstase / Ion Țiriac defeated Arthur Ashe / Dennis Ralston 6–4, 6–3 Margaret Court defeated Billie Jean King 6–3, 7–6