Grigor Dimitrov of Bulgaria has won the ATP Finals after three set victory over David Goffin of Belgium in a hard-fought battle in London. Grigor Dimitrov overcame David Goffin 7-5, 4-6, 6-3 to win the title. It is his fourth title of the year and will lift him three places to No. 3 in the world, behind Rafael Nadal and Roger Federer. The title clash, which lasted for almost two and a half hours, was the longest final since John McEnroe defeated Arthur Ashe at Madison Square Garden in 1978.