Defending champion Maria Sharapova rallied in the third set to beat Angelique Kerber 6-3, 2-6, 7-5 Saturday and earn a spot in the final of the Porsche Grand Prix. Sharapova will play either second-seeded Li Na or qualifier Bethanie Mattek-Sands for the title in the indoor clay-court tournament Sunday. The top-seeded Russian committed two consecutive double-faults to drop her serve at the start of the decisive set. But Sharapova won the last eight points and clinched the match when her third-seeded German opponent hit a backhand long. Sharapova had wasted a chance to serve out the match in the ninth game after taking a 5-3 lead. After winning in Stuttgart last year, Sharapova went on to win the French Open to complete her career Grand Slam. (For more sports news and updates, follow Ahram Online Sports on Twitter at @AO Sports and on Facebook at AhramOnlineSports) http://english.ahram.org.eg/News/70247.aspx