Defending champion Rafael Nadal wins through to semifinals of Rome Masters . Federer and Djokovic both lose in straight sets at the Italian Open. Second-ranked Novak Djokovic also through to Saturday 's last-four matches . Two-time defending champion Women 's No . 1 Serena Williams progresses but second-ranked Li Na loses .
Defending champion Rafael Nadal wins through to semifinals of Rome Masters . Federer and Djokovic both lose in straight sets at the Italian Open. Second-ranked Novak Djokovic also through to Saturday 's last-four matches . Women 's No . 1 Serena Williams progresses but second-ranked Li Na loses .