Goffin beats Thiem to set up ATP Finals semi with Federer

London • David Goffin is into the last four of the ATP Finals, to go any further he'll have to do something he's never done before: beat Roger Federer.The No.7-seeded Goffin beat Dominic Thiem 6-4, 6-1 at the O2 Arena on Friday to set up a semifinal meeting with Federer.From 0-3, 0-15 down in the opening set, Goffin won 15 consecutive points to take control of the match, and never looked back."I've never found a key to beat Roger," said Goffin, who has lost all of his six meetings with the