Roger Federer began his quest for a seventh Nitto ATP Finals title as he faced in-form Paris champion Jack Sock in the opening match of the Boris Becker Group in London - watch the full replay.
Roger Federer v Jack Sock
Replay
London
2017RRRR
Roger Federer began his quest for a seventh Nitto ATP Finals title as he faced in-form Paris champion Jack Sock in the opening match of the Boris Becker Group in London - watch the full replay.
