Jo-Wilfried Tsonga has insisted that he can do better following Saturday's defeat to Novak Djokovic in the Shanghai Masters semi-finals.
The French world number nine was beaten 6-2 7-5 by the defending champion, who will now face either Rafael Nadal or Juan Martin del Potro in Sunday's final.
"Today I played well in the second set," Tsonga is quoted as saying by the ATP's official website. "I know I can play a lot better so I will continue to work."
Tsonga is among a handful of players vying for the final places at next month's World Tour Finals in London.
