[ad_1] Daniil Medvedev loses cool (Screengrabs) Daniil Medvedev endured a dramatic night at the Cincinnati Open, missing three match points before losing 6-7(3), 7-6(4), 6-1 to Brandon Nakashima.The Russian also damaged advertising boards, knocked over microphones and argued with the umpire during a frustrating third-round defeat. Missed chances spark meltdown Medvedev had to fight hard…