Former finalist Juan Martin Del Potro won a terrific contest against Richard Gasquet in the opening night session at the ATP World Tour Finals in London.
Del Potro, seeded fourth, came back from a set down to win 6-7 (4-7) 6-3 7-5 and take an early lead in Group B.
In front of a near-capacity crowd of around 17,000, the Argentine took his record since the US Open to 16 wins in 18 matches.
Novak Djokovic and Roger Federer meet in the same group on Tuesday.
Stanislas Wawrinka vs. Tomas Berdych
Stanislas Wawrinka claimed a three-set victory over Tomas Berdych in the opening match of the ATP World Tour Finals at the O2 Arena in London.
Impressive serving helped the Swiss take the first set, but a resurgent Berdych capitalised on Wawrinka’s errors in the second-set tie-break.
However, Wawrinka turned on the style in the decider for a 6-3 6-7 (0-7) 6-3 victory in two hours and 25 minutes.
Victory gives Wawrinka – who had not before qualified for the World Tour Finals – an early advantage in Group A, which also includes Rafael Nadal and David Ferrer, who play on Tuesday.
