Leander Paes and Martin Damm rallied from a set down to enter the semi-final at the Legg Mason Tennis Classic in Washington on Thuesday.
The Indo-Czech duo, seeded second, beat South Africa's Chris Haggard and Croat Ivo Karlovic 6-7 (3), 6-3, 10-8 in the quarterfinals.
Mahesh Bhupathi and Briton Tim Henman though had to suffer defeat in the second round earlier in the day.
Bhupathi-Henman lost 4-6, 5-7 to third seeds Paul Hanley of Australia and Kevin Ullyett.
Paes-Damm await the winner of the match between Jonathan Elrich and Andy Ram of Israel, and Benjamin Becker and Igor Kunitsyn in the last four.
