Highlights of the fifth day of the Australian Open on Thursday (all times GMT): 1554 TEENAGER TIEN STUNS MEDVEDEV American qualifier Learner Tien held his nerve in a battle that lasted four hours and 49 minutes to stun Russian fifth seed Daniil Medvedev,

Jack Draper made it through with a five-set win over local favourite Thanasi Kokkinakis, while Jacob Fearnley, who is making his debut at the Australian Open, followed up his victory over Nick Kyrgios with a 3-6 7-5 6-2 6-3 win over Arthur Cazaux.

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It's officially tennis season.The world's best players have descended on Melbourne Park for this year's Australian Open.We have 15 days of grand slam action to look forward to, with storylines everywhere you look across both the men's and women's draws.