MELBOURNE, Australia—Daniil Medvedev faced a hostile crowd and a full array of Nick Kyrgios’ outbursts and tricks, and still remained calm for long enough to reach the third round at the Australian Open. The 115th-ranked Kyrgios worked up the crowd, hit ’tweeners and drop shots, mixed up the pace of his groundstrokes and tossed in an under-arm serve in a bid to ruffle the second-ranked Russian. Medvedev kept his composure, taking a quick trip to the locker room after losing the third set and recovering to win 7–6 (1), 6–4, 4–6, 6–2 Thursday on a rowdy Rod Laver Arena. In an on-court TV interview with former champion Jim Courier, Medvedev was asked how he managed to stay so composed. “That’s the only choice when you get booed between first and second serve,” he said, triggering some boos from the crowd. Kyrgios usually likes to play on John Cain Arena, known …