PARIS, Nov 1 - Argentine David Nalbandian and France’s Jo-Wilfried Tsonga will battle it out for the last Masters Cup spot in the final of the Paris Masters after winning their semi-final matches on Saturday.

Nalbandian battled for a 6-1 5-7 6-4 victory over Russian world number six Nikolay Davydenko, while local favourite Tsonga advanced with a 6-4 6-3 defeat of James Blake.

The result ended the American’s hopes of qualifying for the season-ending tournament.

Tsonga’s victory means that Argentine Juan Martin del Potro, who was eliminated earlier in the week here, qualified for the eight-man contest in Shanghai.

He joined Rafael Nadal, Roger Federer, Novak Djokovic, Andy Murray, Andy Roddick and Davydenko at the tournament, which will start on Nov. 9.

"It’s crazy. I’m there. In spite of the three hours (spent on court) yesterday I told myself ‘I’m not tired, I’m strong’," said Tsonga, who needed almost three hours to beat Andy Roddick on Friday.