Grigor Dimitrov claimed the biggest title of his career by beating David Goffin at the ATP Finals - and now has his sights set on winning a Grand Slam. For years Dimitrov has struggled to deliver on his supreme technical talent but the Bulgarian may finally be living up to the hype after he beat Goffin 7-5, 4-6, 6-3 at The O2.

Grigor Dimitrov after winning the ATP Finals on Sunday