Leander Paes teamed up with David Rikl to humble Mario Ancic and Ivan Ljubicic in straight sets in the opening round of the US Open.
The fifth seeds were shocked by Germany's unseeded pair of Nicolas Kiefer and Rainer Schuettler 6-3, 6-3 in the semi-finals.
Mario Ancic beat Spain's Feliciano Lopez 6-3, 3-6, 6-3 in the first round of the China Open.
Champion Roger Federer faces Frenchman Sebastien Grosjean for the first time in more than three years today with a place in the Wimbledon final at stake.
The defending champion turned in a breathtaking performance against one of the most dogged players on the men's tour to reach the semi-finals at Wimbledon.
Ivan Ljubicic salvaged the opening day of Croatia's Davis Cup semi-final against Russia, winning a pulsating five-set duel with Mikhail Youzhny to level the tie 1-1.
It was his first tournament win since January and has left the world number four confident of mounting a challenge at Wimbledon, where he has been drawn against Slovakia's Martin Klizan in the first round.
Novak Djokovic has lost his aura of invincibility but coach Andre Agassi says nobody should be surprised if the Serb goes on to claim his fourth Wimbledon title this month.
Leander Paes aspires to win not only a second Olympics medal but also obliterate the Ramanathan Krishnan's Davis Cup record of most singles win for India.