Ibrox side Glasgow Rangers are set to take on Celtic at Hampden Park on Sunday.
Rangers are due to face Celtic at Hampden Park on Sunday in the Scottish Cup final.
The Ibrox side are yet to beat Celtic in four attempts so far this season, but Law feels that this weekend could be a different result - as the Bhoys may have switched off after winning the league.
“I think you switch off a bit mentally when you win a title,” Law said.
“I’m not sure why and I’m sure Rangers will be hoping this is happening to Celtic.
“I don’t think Rangers have anything to fear.
“The last two games have been really close and could have gone either way.
“As good as Celtic have been this season, I don’t think Rangers will have an inferiority complex this weekend.”
Law played for Rangers for three years between 2013 and 2016, before moving to Bradford City at the start of last season.
During that time he experienced beating Celtic in the cup, but whether Rangers will be able to repeat that feat this time around remains to be seen.
Rangers have been left behind by their Glasgow rivals in the Scottish Premiership this season.
Celtic are still yet to be beaten in domestic action this term, and if they are able to beat Rangers, it will take them a step closer to winning the treble.
Rangers do head into the game with some momentum though, as they are unbeaten under Caixinha’s stewardship so far.