Roger Federer beats David Wagner 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 sixth seed Jo - Wilfried Tsonga in Sunday 's final . The 30-year-old now has the chance to surpass Ivan Lendl and Pete Sampras , who won the tournament five times in the 1980s and '90s respectively . Swiss star will return to No . 2 in year - end rankings above Andy Murray .
Roger Federer beats David Wagner 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 sixth seed Jo - Wilfried Tsonga in Sunday 's final . Swiss star will return to No . 2 in year - end rankings above Andy Murray .