Del Potro, Tsonga reach semifinals in ShanghaiJo-Wilfried Tsonga of France jumps in celebration after defeating Florian Mayer of Germany during the singles quarterfinal match of the Shanghai Masters tennis tournament at Qizhong Forest Sports City Tennis Center in Shanghai, China, Friday, Oct. 11, 2013. Tsonga won 6-2, 6-3. (AP Photo/Eugene Hoshiko)
SHANGHAI (AP) -- 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.
Top-ranked Rafael Nadal and defending champion Novak Djokovic played their quarterfinals late Friday.