Juan Martin del Potro and Jo-Wilfried Tsonga closed in on qualifying for the ATP Finals with quarterfinal victories 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 beat 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 next month's year-end championships in London 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.