By Amy Tennery and Shrivathsa Sridhar NEW YORK (Reuters) -Defending U.S. Open champion Aryna Sabalenka was given an early test before she moved into the second round while Emma Raducanu won her first match at the Grand Slam since her 2021 triumph as the tournament began a day earlier than usual on Sunday.

NEW YORK (Reuters) -Taylor Fritz and Ben Shelton kept American hopes flying high at the U.S. Open while 2021 champion Emma Raducanu advanced to the second round for the first time since her triumph, as the year's final major kicked off a day earlier than usual on Sunday.

The U.S. Open got off to a promising start for the two biggest hopes in American men's tennis. No. 4 seed Taylor Fritz defeated countryman and wild card Emilio Nava 7-5, 6-2, 6-3, while No. 6 seed Ben Shelton cruised past Peruvian wild card Ignacio Buse 6-3,