Novak Djokovic has eased into the quarter-finals of the Miami Open. The world number one beat 14th seed Dominic Thiem 6-3, 6-4. Despite the score, Djokovic says it was a difficult match… In the last eight, Djokovic will take on Tomas Berdych, who beat Richard Gasquet 6-4 3-6 7-5.