Alexander Gustafsson doubles down on his comments on Luke Rockhold’s weak chin.

Alexander Gustafsson isn’t one for trash talk, but the 6 ft 5 inch Swede has a bone to pick with former UFC middleweight champion Luke Rockhold.

Rockhold, 33, will look to move up to the light heavyweight division after his most recent loss to Yoel Romero, but ‘The Mauler’ doesn’t think Rockhold knows what he’s letting himself in for.

Gustafsson, a two-time light heavyweight title challenger, called Rockhold out on social media in February and told Ariel Helwani on a recent edition of The MMA Hour that he wants to send the Californian back to middleweight with his tail in between his legs.

If it’s easier fights Rockhold is pursuing, he won’t find any at 205 pounds.

“First of all, he’s a good…