( CNN ) -- Agnieszka Radwanska is already the most successful Polish female tennis player , but her achievements will reach a new level when the world rankings are released on Monday . The 22-year-old will climb to a career-high No . 5 after winning the Dubai Tennis Championships on Saturday , when she beat Germany 's rising star Julia Gorges 7-5 6-4 in the final . Radwanska , the first Polish woman to pass $ 1 million in prize money , claimed the eighth title of her career and her first this year . She extended her record to 15-3 this season , with her only defeats coming against world No . 1 Victoria Azarenka in the last eight at the Australian Open and the semifinals in Sydney and Doha . Gorges , making her Dubai debut , had reached her fourth career final after knocking out Caroline Wozniacki -- Melbourne champion Azarenka 's predecessor at the top -- in Friday 's semis . Victory on Saturday would have seen the 23-year-old climb to a career-high 15th in the rankings , up from 19 , but -- just like in the fourth round of January 's opening grand slam Down Under -- she had no answer to Radwanska 's game . Meanwhile , former U.S. Open champion Juan Martin del Potro reached his second successive final after beating top seed Jo-Wilfried Tsonga at the Marseille Open on Saturday . The fourth-seeded Argentine , who has climbed back up the rankings to 10th after long-term wrist problems , won 6-4 6-7 ( 9-11 ) 6-3 against the French world No . 6 -- who won this tournament in 2009 . Both players had reached the career milestone of 200 match wins on Friday . Del Potro , who lost to world No . 3 Roger Federer in the Rotterdam final last weekend , will face 2010 champion Michael Llodra in Sunday 's final . The Frenchman went through after beating Serbian third seed Janko Tipsarevic 6-4 7-6 ( 12-10 ) in the second semi . Jurgen Melzer reached the final of the Memphis hard-court event on Saturday , beating Czech third seed Radek Stepanek 6-4 3-6 6-3 . The Austrian followed up Friday 's win over American top seed John Isner , while Stepanek ended the hopes of 2010 winner Sam Querrey of the U.S. in their quarterfinal . Melzer will face last year 's runner-up Milos Raonic on Sunday after the in-form Canadian defeated Germany 's Benjamin Becker in straight sets . The 21-year-old , seeking a third ATP title of the year , took just 75 minutes to ease through 6-4 6-4 . Fourth seed Raonic fired an impressive 14 aces on his way to a ninth straight victory and remains on course to add to his tournament victories in Chennai and San Jose .
Poland 's Agnieszka Radwanska will move up one place in world rankings after Dubai win . She will move into the top five for the first time in her career having claimed eighth title . Juan Martin del Potro and Michael Llodra to contest the final of the Marseille Open . Jurgen Melzer will face in-form Canadian Milos Raonic in the final of the Memphis event .