Roger Federer hits another double, Jelena Jankovic never ceases to entertain and Stanislas Wawrinka unveils a creepy new shirt. Here are the best tweets of the week.
(Berdych and Isner played doubles together at the Madrid Open. They withdrew in the second round.)
(Wozniacki's beloved Liverpool blew a three-goal lead in the final 11 minutes against Crystal Palace on Monday, with the 3-3 tie damaging its Premier League title chances.)