Jason Holt is ineligible against his parent club and fellow midfielder Liam Craig is out with a groin injury but Callum Booth could be involved after arriving on a free transfer in midweek.

Wright told St Johnstone's official website: "We always know when Rangers or Celtic come that they're going to pack the place out so it should be a good atmosphere on Sunday.

"We always want to challenge ourselves against the best teams in the league and that's what we'll be doing this weekend.

"We did well against Rangers here last season and ended up losing out at the death before getting a 0-0 draw at Ibrox after that.

"It was encouraging signs last week at Pittodrie and if we can play to the level I know we're capable of then I'm confident we can get a positive result.

"We have to get the balance right between defence and attack. We know that there will be times that Rangers dominate possession so our shape needs to be good but we'll also try to be as offensive as we can without leaving ourselves open at the back."