Tallon Griekspoor withdraws from Dubai Duty Free Tennis Championships, Daniil Medvedev crowned champion in unsettling final day

The Dubai Duty Free Tennis Championships ATP singles final was slated to be played on Saturday between Daniil Medvedev and Tallon Griekspoor. Tallon Griekspoor was limping into the final after struggling to walk during his semifinal match against Andrey Rublev.…