And down goes another one. Top-seeded Serena Williams lost to Germany’s Sabine Lisicki in three sets Monday. Serena, the defending champion at Wimbledon, is the latest high-ranking player to fall at England’s grand slam. Rafael Nadal fell in the first round, while Roger Federer and Maria Sharapova also bowed out early. Next to fall could be Novak Djokovic, who faces Tommy Haas Monday in the fourth round—a player whom he’s struggled with in the past.