Daniil Medvedev challenges rising stars to keep challenging ‘Big Three’ after ATP Finals victory

The final ball struck in the 2020 season made Daniil Medvedev a deserving last winner of the ATP Finals in London but where the next ball is hit remains to be seen. The Russian became the first man to beat the world's top three players in the tournament's 50-year history as he recovered from a set down to beat US Open...