Daniil Medvedev faces a hefty fine after mangling his racquet and a net camera in an epic temper tantrum before battling through a five-set roller coaster to start his Australian Open on Tuesday. The feisty Russian, a three-time finalist in Melbourne, lost his cool in the third set before rallying to beat 418th-ranked Kasidit Samrej 6-2, 4-6, 3-6, 6-1, 6-2 on Rod Laver Arena. Fifth seed Medvedev was 3-5 behind and on the brink of going two sets to one down against the Thai player when he exploded, slamming his racquet into the net camera repeatedly until they both became a broken mess.