Novak Djokovic, Roger Federer and Rafael Nadal have been absent from the title match at the ATP Finals for the past two years, replaced by younger rivals seeking to smash their monopoly. Instead of the "Big Three" it was Dominic Thiem and Daniil Medvedev who took centre stage at London's O2 Arena on Sunday, with Russia's Medvedev coming out on top. But do the results at the