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Nov 18 (Gracenote) - Results from the ATP World Tour Finals Men's Singles Semifinal matches on Saturday
6-Grigor Dimitrov (Bulgaria) beat 8-Jack Sock (U.S.) 4-6 6-0 6-3
7-David Goffin (Belgium) beat 2-Roger Federer (Switzerland) 2-6 6-3 6-4
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