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Shanghai - Juan Martin del Potro and Jo-Wilfried Tsonga closed in on qualifying for the ATP Finals with quarter-final wins at the Shanghai Masters on Friday.
Del Potro had 27 winners and only eight unforced errors in a 6-3, 6-3 win over Spain's Nicolas Almagro.
Tsonga dispatched Germany's Florian Mayer 6-2, 6-3.
Del Potro, who moved back into the top five in the rankings this week, can clinch a berth in the year-end championships by reaching the final.
Tsonga is further back after missing several months with a knee injury, but he moved into the eighth and final qualifying spot with his win on Friday, just ahead of French compatriot Richard Gasquet.
Top-ranked Rafael Nadal and defending champion Novak Djokovic played their quarter-finals late on Friday.
