Rangers are keen on Norwich City midfielder Graham Dorrans as they look to build a significant challenge to Celtic next season.
Pedro Caixinha's men are set to finish third in the Scottish Premier League while Celtic are unbeaten and champions, and beat Rangers 5-1 in the OId Firm Derby last week.
They are interested in signing Dorrans, who has scored six times in 22 Championship games in a season which has seen him struggle with a muscle injury.
Norwich City are set for an exodus this summer, and have confirmed that goalkeeper John Ruddy will leave the club when his contract expires next month.