#EXCLUSIVE: Jannik Sinner on his Australian Open title defence | 9 News Australia

Jannik Sinner is back in Melbourne - and back in the spotlight - as he begins his Australian Open title defence. | Subscribe and 🔔: http://9Soci.al/KM6e50GjSK9 | Get more breaking news at 9News.com.au: http://9Soci.al/iyCO50GjSK6

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