Italian Musetti suffered a right thigh problem and was unable to complete the match, despite leading by two sets to love.
Novak Djokovic will play in his 13th Australian Open semifinal after his opponent, Lorenzo Musetti, retired from their match ...
Jannik Sinner takes on eighth seed Ben Shelton for a place in the Australian Open semi-finals - follow live and listen to BBC Radio 5 Sports Extra coverage.
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