World number four Daniil Medvedev said the ATP Tour calendar needs to be refocused around the Grand Slams and Masters 1000 events with the lower-tier ATP 250 tournaments moved to an optional slot later in the year.Several players have voiced concerns over the calendar, with four-times Grand Slam winner Ca

World No. 4 Daniil Medvedev said the ATP Tour calendar needs to be refocused in such a way that Grand Slams and Masters 1000 events get prime importance