Nov 18 (OPTA) - Results from the ATP World Tour Finals, World Tour Finals Men's Singles matches on Tuesday .. Round Robin .. 3-Dominic Thiem (AUT) beat 2-Rafael Nadal (ESP) 7-6(7) 7-6(4) 6-Stefanos Tsitsipas (GRE) beat 7-Andrey Rublev (RUS) 6-1 4-6 7-6(6)