NEW YORK (Reuters) - Ana Konjuh was not a year old when Serena Williams played her first U.S. Open match but both will be in the Arthur Ashe Stadium spotlight on Wednesday, with four gripping quarter-finals to take center stage at the year's final grand slam.

NEW YORK (Reuters) - Ana Konjuh has opened some eyes at Flushing Meadows as the 18-year-old former world number one junior emerged to reach her first grand slam quarter-final at the U.S. Open.

Sept 7 (Gracenote) - Results from the U.S. Open Women's Singles Quarterfinal matches on Tuesday

Sept 6 (Reuters) - Latest news from the ninth day of the U.S. Open tennis championships on Tuesday (all times GMT):

NEW YORK (Reuters) - Frenchman Gael Monfils overwhelmed worn-out compatriot Lucas Pouille 6-4 6-3 6-3 to become the first man into the semi-finals of the U.S. Open on Tuesday.

Sept 6 (Gracenote) - Result from the U.S. Open Men's Doubles Quarterfinal on Tuesday

NEW YORK (Reuters) - Second seed Angelique Kerber was first through to the semi-finals of the U.S. Open on Tuesday when Roberta Vinci was tripped up by a foot fault and tumbled out of the year's final grand slam falling 7-5 6-0.

Sept 6 (Gracenote) - Results from the U.S. Open Men's Singles Quarterfinal matches on Tuesday

Sept 6 (Gracenote) - Results from the U.S. Open Women's Doubles Quarterfinal matches on Tuesday