A DEJECTED Roger Federer conceded he was well beaten by Jo-Wilfried Tsonga as the Frenchman kept alive hopes of a home victory at Roland Garros.

Not since Yannick Noah 30 years ago has a home player lifted the Coupe des Mousquetaires, but Tsonga showed he will be a tough man to beat with a thumping 7-5 6-3 6-3 victory over Federer to reach his first semi-final at Roland Garros.

The second seed began the stronger and was an early break up but he was pegged back to 4-4 and from there Tsonga was in control.

Federer saved three set points, one with a superb backhand pass at full stretch, but there was more of the bad than the good from the Swiss today and a shank gave the set to his opponent.

Tsonga has always been capable of brilliance but he and coach Roger Rasheed appear to have added consistency to his game and he was simply too good for Federer.

The 31-year-old said: ‘‘I thought he played great today. He was in all areas better than me. That’s why the result was pretty clean.

‘‘I think I struggled a little bit everywhere. To be honest, I’m pretty sad about the match and the way I played.

But that’s how it goes.

‘‘I tried to figure things out, but it was difficult. And Jo does a good job keeping the pressure on. He can serve his way out of trouble at times.

‘‘He returned better than I did, served better than I did. I struggled to find my rhythm.

‘‘I should have never got broken at 4-3, 40-15. In hindsight now that’s obviously a huge game for me, and things didn’t go well for me today.

‘‘Like after any other type of defeat, I’m disappointed. Perhaps more disappointed than in the past.’’ In the semi-finals Tsonga will meet fourth seed David Ferrer, the other only man in the tournament who has not dropped a set, after he ended the run of Tommy Robredo with a 6-2 6-1 6-1 thrashing.

Federer’s defeat means it will be the first time since Rafael Nadal played Tomas Berdych at Wimbledon three years ago that a grand slam final has been contested by a player outside the big four.

Tsonga was very close to reaching the semi-finals here last year when he held match points against Novak Djokovic but could not take them. Two years ago he beat Federer at the same stage at Wimbledon from two sets down, and he rated this win as among the best of his career.

The Frenchman said: ‘‘For sure, it’s going to be at the top because it’s here at Roland Garros, in France, on a big court with a lot of people, middle of the afternoon, and I just beat Roger Federer.

‘‘I was waiting for rewards because I’m practising hard every day. And today I got the reward.’’ The most important thing for Tsonga now, though, is to try to ensure this victory is not the highlight of his tournament, as has been the case with big wins in the past.

He said: ‘‘I have much more experience today. I know about being too happy about that kind of match. It’s good, but it takes away a lot of energy from you.

‘‘Right now what I need to do is to keep focused on what I have to do. The important thing for me is to go further.’’ The Frenchman will allow himself some bubbles, however, adding: ‘‘It’s the same as when you go on a diet. You can’t live without any pleasure at all. So maybe tonight I’ll indulge myself in having some sparkling water.’’ Ferrer has now matched Tim Henman’s record of six grand slam semi-finals without ever having made a final.

But the Spaniard has lost only 36 games in five matches, and he said: ‘‘If I pull through it’s going to be my first final in a grand slam, but it’s one match I have to play.

‘‘I’m not going to start dreaming and celebrate before it’s time. It’s one match.

That’s it.’’ Serena Williams admitted her French Open quarterfinal nightmares of the past briefly came back to haunt her before she fought back to defeat Svetlana Kuznetsova.

The Russian had three chances to go 3-0 up in the deciding set but could not take them and they proved the key moments as Williams clinched a 6-1 3-6 6-3 victory to reach the semi-finals in Paris for the first time in a decade.

Four times in the intervening years she has lost in the last eight, including to Kuznetsova when the Russian went on to win the tournament in 2009.

In the semi-finals Williams will face last year’s runner-up, Sara Errani, who knocked out fourth seed Agnieszka Radwanska for her first ever win over a top-five opponent at the 29th attempt.