Rafael Nadal had to struggle through another three-set challenge before beating Frenchman Jo-Wilfried Tsonga 6-4, 6-7 (5-7), 6-4 on Friday to reach the Rotterdam Open semi-finals. Nadal will face either Gael Monfils or Julien Benneteau on Saturday for a place in the final. Andy Murray produced a 7-6 (7-2), 4-6, 3-0 victory over French opponent Marc Gicquel, who pulled out with a hamstring injury, and then suggested a plan to try and change the new drug-testing regime. Murray will next meet Croatia's Mario Ancic, who put out 2007 champion Mikhail Youzhny 6-4, 6-2. Mauresmo dazzles Amelie Mauresmo restored a measure of French pride with a crushing quarterfinal victory over Polish fourth seed Agnieszka Radwanska 6-2, 6-0 at the Paris Open on Friday, after three of her compatriots had been eliminated. Top seeds Serena Williams, Jelena Jankovic and Elena Dementieva all progressed to the semifinals at the expense of French players. Number one seed Williams saw off qualifier Emilie Loit 6-4, 6-1. Second seed Jankovic rallied to overcome fifth seed Alize Cornet 5-7, 6-4, 6-4. Nathalie Dechy had booked her place in the last eight with a three-set victory over sixth seed Patty Schnyder of Switzerland late on Thursday, and the effort of her exertions showed as she was overpowered by Dementieva 6-3, 6-2 in just over an hour. Dementieva's victory means she will meet Williams in the semifinals on Saturday, while Jankovic must face the in-form Mauresmo. Wozniacki upset Caroline Wozniacki was upset by eighth seeded Magdalena Rybarikova in the quarterfinals of the Pattaya Open on Friday, the number two seed falling 6-4, 6-1. But top seed Vera Zvonareva had little difficulty against Chinese fifth seed Shuai Peng, winning 6-2, 6-3, and there was also victory for seventh seed Shahar Peer of Israel, who defeated Vera Dushevina of Russia 6-4, 4-6, 6-2. In only her second tournament since the Beijing Olympics after suffering a wrist injury, India's Sania Mirza upset sixth seeded Thai Tamarine Tanasugarn 7-5, 6-4. Roddick struggles Andy Roddick struggled to victory as Juan Martin del Potro and James Blake made it look easy, advancing to the quarterfinals at the SAP Open on Thursday. Roddick had his hands full as he defeated Ernests Gulbis 6-3, 7-6 (3). Last year, Gulbis gave Roddick trouble at the US Open when he took the first set before the American took the match in four. No. 2 seeded del Potro of Argentina made short work of Japan's Kei Nishikori 6-2, 6-2 to make it the quarterfinals while American Blake beat Florent Serra of France 6-4, 6-3. The sixth-seeded Querrey knocked off Germany's Denis Gremelmayr 6-3, 6-2 to advance. Del Potro's opponent will be Mardy Fish of the US, who struggled past compatriot John Isner 6-2, 6-7 (4), 7-5. Also, qualifier Todd Widom made it to his first ATP quarterfinals when he overcame Taylor Dent 6-7 (5), 6-3, 6-2 in another all American match. Almagro knocked out Defending champion and top seed Nicolas Almagro was eliminated by Frederico Gil 7-6 (5), 7-6 (4) in the Brazil Open quarterfinals on Thursday. Gil will meet Thomaz Bellucci who spoiled Juan Carlos Ferrero's 29th birthday by beating him 7-6 (5), 1-6, 6-3. In other matches, Tommy Robredo downed Alberto Martin 6-2, 6-2 and Jose Acasuso beat Eduardo Schwank 6-4, 6
