Daniil Medvedev wasted no time in questioning an umpire at the Shanghai Masters after being slapped with a code violation. The Russian battled through to secure a 7-6, 6-7, 6-4 victory over Learner Tien in Wednesday's round of 16 clash, though the encounter was marred by a heated exchange. The tennis star was penalised for his prolonged serving ritual before exploding at official Mohammed Lahyani during a break in proceedings - insisting that Rafael Nadal was notorious for his leisurely