while this incident raises once again the question of what constitutes protest in sport as political, it is clear the biggest concern is still regarding the well being and whereabouts of peng shuai. to matters on the court in melbourne, and daniil medvedev is into the quarter finals, after taking more than three and a half hours to beat maxime cressy in four sets. medvedev apologised to his opponent afterwards, for venting his frustration especially in dropping the second set. the us open champion, having ended novak djokovic s tilt at the calendar grand slam last year and he ll face felix auger alliasime next. stefanos tsitsipas was also put through the mill. he came from behind twice to beat taylor fritz, who produced some stunning shots. tsitsipas has reached the semi finals in melbourne twice, but he s still looking for a first grand slam title. the crowd absolutely loved it tsitsipas said the atmosphere was overwhelming . he meets jannik sinner next.