MADRID, May 8 (AFP): Rafael Nadal showed no signs of his recent slump in form as he eased past Italy�s Simone Bolelli 6-2, 6-2 to reach the quarter-finals of the Madrid Open on Thursday.
Women�s top seed Serena Williams and defending champion Maria Sharapova also stayed on course for a potential meeting in the final as they progressed to the last four with wins over Carla Suarez Navarro and Caroline Wozniacki respectively.
Nadal has yet to win a European clay court tournament this season after defeats to Novak Djokovic at the Monte Carlo Masters and Fabio Fognini at the Barcelona Open last month.
However, he remains the heavy favourite in the Spanish capital in the absence of world number one Djokovic and will continue his quest for a fifth Madrid title against Bulgaria�s Grigor Dimitrov on Friday. Dimitrov disposed of Stan Wawrinka in the last-16 7-5 (7/5), 3-6, 6-3 just as he did at Monte Carlo.
Tomas Berdych continued his impressive start to the clay court season as he also marched into the quarter-finals with a 7-5, 6-2 win over Jo-Wilfried Tsonga.
The Czech faces John Isner in the last eight after the American beat Roger Federer�s conquerer Nick Kyrgios 6-3, 6-7 (7/9), 6-4. Seventh seed David Ferrer won the battle of the Spaniards as he came from a set down to beat Fernando Verdasco 5-7, 6-4, 6-4. Williams extended her unbeaten record this season to 24-0 as she swept aside Spain�s Navarro 6-1, 6-3.
The 19-time Grand Slam champion will face fourth seed Petra Kvitova on Friday after the Wimbledon champion beat Irina-Camelia Begu 7-5, 6-3.
Sharapova also reached the last four for a third consecutive year with a 6-1, 3-6, 6-3 win over Wozniacki.
Kuznetsova battled past Lucie Safarova 5-7, 7-6 (7/5), 7-6 (7/3) in over three hours on court to make her first semi-final since last July in Washington.