Sept 3 (Reuters) - Latest news from the sixth day of the U.S. Open tennis championships on Saturday (all times GMT):

Sept 4 (Gracenote) - Results from the U.S. Open Men's Singles Round 3 matches on Saturday

NEW YORK (Reuters) - Third seed Stan Wawrinka saved a match point at the U.S. Open on Saturday before squeezing past unheralded Briton Dan Evans in five sets to reach the fourth round. The Swiss faced match point at 5-6 in the fourth-set tiebreak but won it 10-8 and then raced through the final set to clinch a 4-6 6-3 6-7(6) 7-6(8) 6-2 victory. "It was an unbelievable fight," Wawrinka said. "I'm for sure lucky to get through that match, saving match point. He played really great, he's really talented and he was really pushing me. "To finish like that, I'm really happy to get through. It wasn't easy for me to find my best game." World number 64 Evans described his loss as a "heartbreaker" after coming so close to reaching the last 16 of a grand slam for the first time.

NEW YORK (Reuters) - Flummoxed and frustrated by wily veteran Paolo Lorenzi for two sets, second seed Andy Murray changed tactics and beat the 34-year-old Italian at his own game to advance to the U.S. Open fourth round on Saturday.

Sept 4 (Gracenote) - Results from the U.S. Open Women's Singles Round 3 matches on Saturday

NEW YORK (Reuters) - Sixth seed Kei Nishikori continued to be a French bogeyman, beating a sluggish Nicolas Mahut 4-6 6-1 6-2 6-2 in the third round at the U.S. Open on Saturday.

NEW YORK (Reuters) - Novak Djokovic and Rafael Nadal can take a step closer to a 50th career showdown when they play their fourth-round matches at the U.S. Open on Sunday.

NEW YORK (Reuters) - When former U.S. Open champion Juan Martin del Potro began his latest comeback in March he said he was playing for fun after three operations on his wrist.

NEW YORK, Sept 3 (Reuters) - Order of play on the main showcourts at the U.S. Open on Sunday (prefix numbers denote seeding):