( CNN ) -- Jo-Wilfried Tsonga 's hopes of reaching the ATP World Tour Finals suffered a blow Saturday as the top seed crashed out of the Erste Bank Open in Austria . The Frenchman is ranked ninth in the Race to London , but at this stage would take one of the eight places on offer due to Andy Murray 's season-ending back surgery . However , while Tsonga lost in the Vienna semis to Dutchman Robin Haase , his 10th-ranked compatriot Richard Gasquet earned a place in the final of the Kremlin Cup in Moscow to boost his chances of grabbing one of the four remaining spots . Former world No . 5 Tsonga is seeking to catch up on points after struggling with injury earlier this season , missing three months as he sat out the U.S. Open . He could have moved above Swiss duo Roger Federer and Stanislas Wawrinka by adding to his 2011 Vienna crown this weekend . `` I 'm not in the best of shape and it showed out there , '' Tsonga told reporters . `` But I have to keep playing if I want to make London . `` I had my chances but he was too good . I just have to keep fighting and trying to win matches . '' World No . 63 Haase , who won the Austrian Open clay event in 2011 and 2012 , will take on German veteran Tommy Haas in the final of the indoor hard-court tournament on Sunday . Haas is ranked 12th in the ATP standings but has a big gap to make up on Tsonga and Gasquet . `` There 's still a chance , but obviously I will have to play extremely well next week and also in Paris , maybe even win Paris , '' said the 35-year-old , who made his debut in the Vienna event in 1997 and won the title in 2001 . He reached his third final this season , and 27th overall , after beating 44th-ranked Czech Lukas Rosol 3-6 6-4 7-6 ( 7-0 ) to take his record to 46-19 in 2013 . Gasquet , the top men 's seed this week in Russia , reached the final with a 6-4 7-5 win over Croatia 's Ivo Karlovic . He will next play Kazakh qualifier Mikhail Kukushkin , who beat Italy 's defending champion Andreas Seppi 6-1 1-6 6-4 . Victory will put Gasquet above Tsonga in the ATP standings ahead of next week 's events in Valencia and Basel , with the Paris Masters closing the regular season the following week . Fourth-ranked David Ferrer , who has already qualified for London , reached the final of the Stockholm Open with a 3-6 6-4 6-1 win over Latvia 's Ernests Gulbis . The Spanish top seed will next play Bulgaria 's Grigor Dmitrov , who beat France 's Benoit Paire 4-6 6-2 6-2 . Meanwhile , the WTA Tour announced Saturday that former world No . 1 Caroline Wozniacki and American Sloane Stephens will be the alternates for the season-ending championships in Istanbul next week . The duo can expect to be called up if any of the eight qualified players pull out of the tournament . The draw for the two groups will take place Sunday . None of that line-up are involved in this week 's events in Moscow and Luxembourg . Luxembourg top seed Wozniacki , ranked 10th , will face Germany 's Annika Beck in Sunday 's final . The Dane , who has reportedly split with golf star boyfriend Rory McIlroy , defeated German third seed Sabine Lisicki while Beck went through when Stefanie Voegele retired in the second set of their semi . Former U.S. Open champion Sam Stosur will contest the Kremlin Cup final against Romanian fifth seed Simona Halep . The Australian , who won the Osaka title last weekend , beat two-time grand slam winner Svetlana Kuznetsova 6-2 6-4 while Halep defeated another Russian , Anastasia Pavlyuchenkova , 6-2 6-1 .
Top seed Caroline Wozniacki loses in semifinals of American tournament . Fellow Frenchman Richard Gasquet can gain ground by winning Luxembourg Open title . Fourth -ranked Caroline Wozniacki through to final of Stockholm Open . Caroline Wozniacki reaches final of Moscow .