Arthur Gea had more than his opponent to worry about at the French Open over the weekend ... because the dude suffered a full-blown bathroom emergency in the middle of his match and had to sprint off the court ASAP. The French tennis star was making his French Open debut against Karen Khachanov Sunday when he suddenly stopped playing and pleaded with the chair umpire for an emergency bathroom break. "I need to go to the bathroom. I can't move anymore," Gea said before rushing off court. At one