Sept 8 (Gracenote) - Results from the U.S. Open Women's Doubles Semifinal matches on Thursday

NEW YORK (Reuters) - Swiss third seed Stan Wawrinka outlasted tiring former champion Juan Martin del Potro in four sets to advance to the semi-finals of the U.S. Open on Wednesday.

Sept 8 (Gracenote) - Results from the U.S. Open Men's Singles Quarterfinal matches on Wednesday

NEW YORK (Reuters) - Simona Halep did something no one else was able to do against Serena Williams at the U.S. Open on Wednesday but still could not stop the world number one from advancing to the semi-finals of the year's final grand slam.

NEW YORK (Reuters) - Serena Williams will be wary of another semi-final slip-up when she takes to the Arthur Ashe Stadium court on Thursday to face 10th seed Karolina Pliskova for a spot in the U.S. Open final.

NEW YORK (Reuters) - Japan's Kei Nishikori overcame second seed Andy Murray for a gruelling 1-6 6-4 4-6 6-1 7-5 see-saw victory on Wednesday to reach the U.S. Open semi-finals.

Sept 8 (Gracenote) - Results from the U.S. Open Men's Doubles Quarterfinal matches on Wednesday

Sept 8 (Gracenote) - Results from the U.S. Open Women's Singles Quarterfinal matches on Wednesday

NEW YORK, Sept 7 (Reuters) - Kei Nishikori is calm and quiet on court and a paragon of sportsmanship, but the Japanese enjoyed taking revenge against Andy Murray at the U.S. Open on Wednesday.