Stan Wawrinka shattered French hopes of a first men's singles champion in 32 years on Friday when he outlasted Jo-Wilfried Tsonga 6-3, 6-7 (1/7), 7-6 (7/3) 6-4 in the first of the semifinals.

The French Open semi-final between Novak Djokovic and Andy Murray was suspended Friday as a severe storm approached Roland Garros.

World number one Djokovic was leading 6-3, 6-3,5-7,3-3 when play was halted at 1833GMT and is unlikely to continue with the weather worsening.

It was a consummate performance from the Wawarinka and he will harbour high hopes of taking a second Grand Slam title on Sunday when he goes up against either top seed Novak Djokovic or third seed Andy Murray.

The 2014 Australian Open winner reached the final in Paris for the first time having lost just two sets along the way.

For Tsonga, the dream of emulating Yannick Noah, the last Frenchman to win at Roland Garros in 1983, was over for another year. The last Frenchman to reach the final was Henri Leconte in 1988.

"It was a huge battle, very difficult physically, a lot of intensity on both sides and it could have gone either way," Wawrinka said.

"He had chances to break me in the third set, but he had a great tournament and deserves just as much as me to be in the final."

The semifinalists, both aged 30, had met twice before at Roland Garros, each winning in five sets, but their most recent encounter was a superb four sets Davis Cup final win for Wawrinka in November.

That sent Tsonga's form into a tailspin made all the worse by a bad wrist injury that sidelined him until March.

But Roland Garros saw him back to near his best, defeating fourth seed Tomas Berdych and fifth seed Kei Nishikori to reach the semis for the second time.

Wawrinka, a straight-sets winner over countryman Roger Federer in the quarterfinals, struck first, clawing his way back from 0-40 down to breakTsonga's serve for a first time in the fourth game.

That was enough to give him the first set on a baking hot day which saw the temperature nudging above 30 degrees.

The Swiss eighth seed was clearly on top and he broke again to start the second set.

Wawrinka's first serve was regularly in the 210-215 kph range and thatleft Tsonga struggling to cope.