Roger Federer beat Dominic Thiem 6-2, 6-3 in his latest round-robin match at the ATP World Tour Finals tennis tournament at the O2 Arena in London on Tuesday. AFP
Roger Federer beat Dominic Thiem 6-2, 6-3 in his latest round-robin match at the ATP World Tour Finals tennis tournament at the O2 Arena in London on Tuesday. AFP

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