Shanghai- Jo-Wilfried Tsonga claimed his third revenge win in two months over Novak Djokovic as he produced a 1-6, 7-5, 6-1 Gold group comeback to spoil the Serb's hopes for a perfect group record on Thursday at the Masters Cup.

The 23-year-old Tsonga is out of consideration for a semi-final spot, but earned a moral victory over the man who beat him in the Australian Open final in January. Djokovic ended with a 2-1 mark.

Tsonga has now proved his point over the world number three in the Bangkok final and third round at Paris Bercy in addition to the year-end spectacular.

Argentine debutant Juan Del Potro and experienced Russian Nikolay Davydenko were playing off later to join Djokovic in the last four, where play begins on Saturday.

Tsonga was competing purely for pride in Shanghai and showed that he is a force to reckoned with as he rallied after a first-set thrashing at the hands of the world number three.

Djokovic heads into the weekend with confidence still intact after losing all three of his matches a year ago on his debut.

Tsonga finished his job in one hour, 38 minutes with a winning lob which the Serb could only watch sail over his head.

Djokovic has won three quality titles in 2008, the first Grand Slam of the season and Masters events in Indian Wells and Rome, but has not tasted trophy success since May.

Tsonga improved to 3-1 over his rival and leaves Shanghai primed to lift his number seven ranking when he resumes again in January. (dpa)