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Djokovic, Federer reach Paris Masters semis

Paris, France ( - Former world No. 1s Novak Djokovic and Roger Federer posted quarterfinal victories Friday at the $3.65 million Paris Masters tennis event.

The second-seeded Djokovic, who still has a slim chance of overtaking Rafael Nadal for the year-end No. 1 ranking, got past seventh-seeded Swiss slugger Stanislas Wawrinka 6-1, 6-4, as the recent China Open and Shanghai Masters titlist extended his current overall winning streak to 15 matches.

Djokovic improved to 14-2 lifetime against Wawrinka, which includes wins at the U.S. and Australian Opens this year.

The 2009 Paris Masters champion Djokovic and Federer will square off in one of Saturday's semifinals. Federer is 16-13 lifetime against his Serbian counterpart and Saturday will mark their first meeting of 2013.

A fifth-seeded Federer exacted some revenge on fourth seed Juan Martin del Potro, 6-3, 4-6, 6-3, in 1 hour, 43 minutes on the hardcourts at Palais Omnisports de Paris-Bercy. Del Potro defeated his fellow former U.S. Open champ in last week's marquee finale at the Swiss Indoors in Basel, which is Federer's hometown in Switzerland.

The 32-year-old Federer doubled-up del Potro in aces on Day 5 in Paris (6-3) and broke the tall South American on twice as many occasions (4-2) en route to the final four in the French capital. Federer broke "Delpo" to close out the match.

Federer is now 14-5 lifetime against del Potro, who had won their last three encounters.

The 6-foot-6 Argentine star del Potro had reached finals in his previous three events.

This week's big winner in Paris will collect $720,000.

11/01 14:49:44 ET