After the crash of top seeds Novak Djokovic and Rafael Nadal from the Qatar Open Tennis Championship, stage is set for Semifinal matches in Doha today. Fourth seed David Ferrer takes on big serving Ivo Karlovic in the first Semifinal. Karlovic defeated World Number One Novak Djokovic in the quarter finals yesterday. In the other Semifinal, third seed Tomas Berdych faces Andreas Sippi.