Jack Sock kept his dreams of a fairytale finish to his season alive, beating Wimbledon finalist Marin Cilic 5-7, 6-2, 7-6 (7/4) at the ATP Finals. Cilic, who won the 2014 US Open, broke the American twice to win the first set but found himself adrift in the second as Sock levelled the round-robin match with two breaks of his own. In a see-saw deciding set, the Croatian fifth seed started quickly and raced to a 3-0 lead before Sock, the eighth seed, steadied himself, cancelling out the break. The match then settled back on serve and went to a tie-break. Although Cilic edged ahead 4-2, Sock held his nerve, winning five points in a row to seal the victory.

Source: AFP