Ricky Burns insists he has no concerns over his jaw ahead of Saturday's WBO world lightweight title defence against Terence Crawford.
But the 30-year-old is in confident mood ahead of his fifth title defence at Glasgow's SECC.
"My jaw's been holding up as well. I've taken a few knocks and it seems to be holding up," Burns said.
The Scot expects a "cracking and very hard fight" against American mandatory challenger Crawford.
"Technically, he's very good. The training's gone well and, fingers crossed, I'm prepared for whatever's coming my way on Saturday," added Burns.
"Fingers crossed [my jaw] holds up on fight night and there's no accidents.
"Crawford is a very slick boxer; he switch-hits and he's very good both orthodox and southpaw.
"We tried to get Jose Gonzalez, who I boxed before, over for sparring. He would have been ideal but sadly we couldn't get that to work,
"But we know what we're expecting and we've had plenty of variety in sparring."
Promoter Eddie Hearn believes Crawford has never been properly tested despite his unbeaten record.
Crawford, 26, is unbeaten in his 22 bouts and has won 16 of his fights by knockout.