LONDON (AP) — Roger Federer and Serena Williams will try to avoid further upsets at Wimbledon as the third round begins on Friday. Federer was set to play Jan-Lennard Struff of Germany and Williams faced Kristina Mladenovic of France as they continue their quests for a ninth and eighth Wimbledon title, respectively. Williams finds herself the favorite again after defending champion Garbine Muguruza lost on Thursday, meaning only two of the top-eight seeded women are still in the field. No.Read more on NewsOK.com