MONTREAL: Roger Federer and Rafael Nadal both exited the Montreal Masters on a historic day of ATP tennis when the world’s top eight reached the quarter-finals at the same event for the first time. The No 1 and 2 in the world were unable to carry the flag for the elite, with Federer letting a 5-1 lead in the final set escape as Jo-Wilfried Tsonga grappled to a 7-6 (7/5), 1-6, 7-6 (7/3) victory in the quarter-finals. Second seed Nadal, the defending champion, was humbled by rising Argentine Juan Del Potro 7-6 (7/5), 6-1. Del Potro will next square off against on-fire American Andy Roddick, a 6-4, 7-6 (7/4) winner over fourth seed Novak Djokovic. Roddick has lost his last two finals in close calls, at Wimbledon against Federer and last weekend against Del Potro in Washington. Tsonga fought back from 1-5 down in the final set to end Federer’s 21-match winning streak. The Swiss star’s game collapsed under relentless assault from the Frenchman, with Tsonga twice breaking Federer as the 15-time Grand Slam champion served for victory. Tsonga set up three match points on Federer’s serve in the 12th game, which the Swiss saved. His luck ran out in the tiebreaker as Tsonga set-up a meeting with Briton Andy Murray. Federer’s loss ended a run of impressive form which began with a title victory at the Madrid Masters in May over Nadal and progressed through to Grand Slam trophies at the French Open and Wimbledon. Murray beat Russia’s Nikolay Davydenko 6-2, 6-4.