Tour de force from dominant Dimitrov

LONDON - The coaching seemed to have helped, whether Grigor Dimitrov heard it or not.

The sixth-seeded Bulgarian made his way into the semifinals of the ATP World Tour Finals on Wednesday by whipping David Goffin 6-0, 6-2, but was given a violation for coaching during the second set.

A linesman informed the chair umpire of the infraction during the fifth game of the final set, and Dimitrov reacted by saying he didn't hear anything.