Yahoo Sports reports: Serena Williams lost for the first time in her stunning comeback when the American great and her Czech partner Karolína Muchová were beaten at the Berlin Open on Tuesday. Giuliana Olmos of Mexico and New Zealand's Erin Routliffe prevailed 6-4, 6-2 at Steffi Graf Stadium just hourse after Williams was confirmed to receive a wildcard for the Wimbledon doubles together with her sistar Venus.