Tsonga continued his strong end to the season with a 6-3 7-5 win over seventh seed Berdych in Saturday 's second semi . Roger Federer beats David Ferrer 7-5 6-3 in semis at ATP World Tour Finals . The 16-time grand slam champion is seeking a record sixth title in London . He will face French third seed Roger Federer in Sunday 's final . Swiss star will return to No . 7 in Sunday rankings above Roger Federer .
Roger Federer beats David Ferrer 7-5 6-3 in semis at ATP World Tour Finals . The 16-time grand slam champion is seeking a record sixth title in London . He will face French third seed Roger Federer in Sunday 's final . Swiss star will return to No . 7 in Sunday rankings above Roger Federer .