Murray and Serena book third round passages in Cincinnati August 14, 2013 -- Updated 2146 GMT (0546 HKT) Andy Murray back on form at the Cincinnati Masters World No.2 beats Mikhail Youzhny of Russia in straight sets Joined in the third round by Novak Djokovic Serena Williams battles past Canadian Eugenie Bouchard (CNN) -- Serena Williams was extended to three sets by one of the next generation of stars hoping to assume her No.1 mantle before advancing to the third round of the WTA event in Cincinnati Wednesday. 19-year-old Canadian Eugenie Bouchard is ranked 62nd in the world but showed enough to suggest she will be aiming higher very soon. She took the opening set 6-4 before Williams turned the match around in her trademark fashion to level a one set apiece. Bouchard, who beat former World No.1 Ana Ivanovic at Wimbledon this year, kept battling but Williams had too much experience to run out a 4-6 6-2 6-2 winner in one hour 47 minutes. Williams is coming off winning the title in Toronto at the weekend as she continues her dominant form on the WTA this season. Only surprise defeats at the Australian Open to Sloane Stephens and at Wimbledon to eventual runner-up Sabine Lisicki have interrupted her winning run and she will be heavy favorite to defend her U.S. Open crown later this month. Read: Stephens shocks Sharapova Fellow American Stephens shocked World No.3 Maria Sharapova Tuesday at the hard court tournament in Ohio where top billing is shared with the ATP event. World No.2 Andy Murray got his campaign in Cincinnati off to a winning start with a 6-2 6-3 victory over Mikhail Youzhny of Russia in an earlier match. The Wimbledon champion had lost his third round match at the Montreal Masters last week on his return to the circuit after his historic triumph, but made no mistake here. The 26-year-old Scot broke service five times on his way to victory in just 70 minutes. It extended his career record against Youzhny to 4-0 having beaten him in the fourth round at Wimbledon. Murray has won the Cincinnati trophy twice, beating Novak Djokovic both times in the final. "I think it's important for me to try to get a few matches this week, if I can," Murray told the official ATP Tour website. I did what I wanted to do and got through the match. He was joined in the third round by top seed Novak Djokovic, who beat Juan Monaco of Argentina 7-5 6-2. The Serbian is bidding to complete his set of the nine Masters 1000 titles this week, coming off the back of a semifinal loss to returning Rafael Nadal in Montreal. In earlier action Wednesday, veteran German Tommy Haas earned a third round match against Roger Federer after beating Marcel Granollers 6-4 6-1 in 74 minutes. August 1, 2013 -- Updated 1133 GMT (1933 HKT) 1 Martina Hingis made her long-awaited return to WTA action at the Southern California Open with victory in the women's doubles. July 26, 2013 -- Updated 1427 GMT (2227 HKT) Viktor Troicki believes he has been "treated like a criminal" after being hit with an 18-month ban for flouting doping regulations. July 9, 2013 -- Updated 0957 GMT (1757 HKT) You can be forgiven for losing track of time the morning after a night 77 years in the making.