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 .
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 sixth seed Jo-Wilfried Tsonga in Sunday 's final . Swiss star will return to No . 3 in year-end rankings above Andy Murray .