The 10th-seeded Frenchman is a two-time Grand Slam semifinalist, but he can't seem to win anywhere at the moment. ___4:55 p.m.U.S. Open champion Dominic Thiem has moved into the second round at the Australian Open, where he was the runner-up to Novak Djokovic a year ago. Thiem had been 0-3 in Grand Slam finals until emerging for the championship at Flushing Meadows in September. The first tournament of this year’s Grand Slam season began after a three-week delay because of the coronavirus pandemic. Serena Williams begins her latest bid for a 24th Grand Slam singles title in the following match against Laura Siegemund.