PARIS (AP) ― Rafael Nadal and Novak Djokovic overcame big servers Thursday to reach the Paris Masters quarterfinals.

Nadal beat last year’s runner-up, Jerzy Janowicz, 7-5, 6-4, and Djokovic rallied from a set down to top John Isner 6-7 (5), 6-1, 6-2.

Roger Federer, defending champion David Ferrer, Juan Martin del Potro, Tomas Berdych, Stanislas Wawrinka and Richard Gasquet also won their third-round matches.

The tournament has turned into a rehearsal for the ATP World Tour Finals, with the eight quarterfinalists also the eight players who qualified for the London tournament next week. Wawrinka and Gasquet grabbed the last two spots at the season ending-event when Berdych eliminated Milos Raonic of Canada 7-6 (3), 6-4.

Nadal broke for a 6-5 lead before whipping a forehand winner down the line to take the first set.

The top-seeded Spaniard and Janowicz traded breaks early in the second set before the Pole double-faulted to hand Nadal a 3-2 lead. The U.S. Open champion won when Janowicz’s forehand sailed long.

“I tried to move him, because if he plays in a good position, he has a great shot,” Nadal said. “I think for a moment my return was unbelievable today.”