Rafael Nadal insisted he can still win the ATP Finals for the first time despite a damaging 7-6 (9/7), 7-6 (7/4) defeat against Austria's Dominic Thiem on Tuesday. Thiem overpowered Nadal behind closed doors at London's O2 Arena to put a dent in the Spanish star's bid to finally lift the one major prize missing from his packed trophy cabinet.

Thiem became the first player to qualify for the semi-finals a few hours later when reigning champion Stefanos Tsitsipas beat Russian seventh seed Andrey Rublev 6-1, 4-6, 7-6 (8/6).