Young Boys pressed heavily to get back into the game, with James McCarthy having to perform some much needed defensive duties.
Handbags! Ross Barkley clashes with Sekou Sanogo, but both escaped unpunished.
Lukaku then pounced to complete his hat trick, looking like he’s worth every penny of that £28m transfer fee.
Late drama, though, saw defender John Stones dismissed for this lazy challenge. Luckily for him, Young Boys missed the resulting penalty.