Roger Federer not making excuses for defeat to David Goffin in ATP semis

Roger Federer offered no excuses for his shock defeat by David Goffin in the last four of the ATP Finals.

The Swiss superstar seemed a near certainty to claim a seventh end-of-season crown due to the absences of Andy Murray and Novak Djokovic, and the early withdrawal of Rafael Nadal, as well as his own stunning form this year.