Juan Martin del Potro beat top-seeded Jo-Wilfried Tsonga Saturday to grab one of the berths in the finals of the Open 13 in Marseille, France. Del Potro took nearly 3 hours to eliminate Tsonga 6-4, 6-7 (9-11), 6-3. Del Potro, the No. 4 seed in the tournament, will face Frenchman Michael Llodra in Sunday\'s finals. Llodra upended third-seeded Janko Tipsarevic 6-4, 7-6 (12-10) to reach the Marseille finals for the third time in four years. He won the title in 2010.