World number one Novak Djokovic was knocked out of the Shanghai Masters in the quarter-finals by sixth seed Stefanos Tsitsipas. Greek 21-year-old Tsitsipas came from a set down – having lost the opening three games in seven minutes – to beat the defending champion 3-6 7-5 6-3. He will play Daniil Medvedev in the semi-finals … The post Tsitsipas knocks out world number one Djokovic at Shanghai Masters appeared first on Keep Talking Greece.