BRISBANE, Australia (AP) — Ash Barty has joined the ranks of high-profile players expressing concern over the staging of the U.S. Open while there’s still so much uncertainty around the coronavirus pandemic. The women’s No. 1 hasn’t had the chance yet to defend her French Open title because all elite tennis competition is shuttered. She’s still awaiting clarity on the U.S. Open, which is scheduled to start Aug. 31. Novak Djokovic and Rafael Nadal have aired reservations about the potential restrictions on players and other changes being considered. Barty says “I understand the tournaments are eager to run but keeping everyone safe has to be the priority.”