Watch as Milan fought back from a couple of surprising Udinese headers to secure victory in a six-goal thriller, amid VAR controversy and an Ante Rebic brace.
The reigning champions of Italy had the worst possible start, trailing within 90 seconds, but a Theo Hernandez penalty and Rebic strike turned it around.
Adam Masina nodded in a cross, only for Brahim Diaz and another Rebic finish to seal the scoreline.
Udinese were furious at the penalty award, as VAR intervened after Davide Calabria and Brandon Soppy collided going for a loose ball.