Japan's former world No. 1 Naomi Osaka said her goal for the U.S. Open was to smile and have fun, and she appeared to be doing plenty of both in Monday's fourth-round victory over American star Coco Gauff.The four-time major winner, who has spoken openly about dealing with depression, wore a cheerful expression much of the way as she overwhelmed No. 3 seed Gauff 6-3, 6-2 and advanced to a Grand Slam quarterfinal for the first time since her 2021 Australian Open triumph.The unexpectedly one-sided display against one of the tournament favorites suggests Osaka's Grand Slam resurgence could ext…READ FULL ARTICLE