Medvedev, Rublev Advance to Dubai Quarterfinals; De Minaur Cruises in Acapulco; Martinez Wins in Santiago
DUBAI DUTY FREE TENNIS CHAMPIONSHIPS—Dubai, U.A.E. Second-round results: Daniil Medvedev (1) Defeats Lorenzo Sonego 3-6, 6-3, 6-3Andrey Rublev (2) Defeats Arthur Cazaux 6-4, 6-4Hubert Hurkacz (3) Defeats Christopher O’Connell 7-6(5), 6-4Jiri Lehecka Defeats Karen Khachanov (4) 6-7(6), 7-6(5), 6-4Ugo Humbert (5) Defeats Andy Murray 6-2, 6-4Alexander Bublik (7) Defeats Tallon Griekspoor 7-6(8), 7-6(2)Alejandro Davidovich Fokina…