Rangers face a series of tense transfer battles before they can even think about the first Old Firm derby of the season at Celtic Park. The Ibrox side are looking for as many as four new players before Friday’s 11pm deadline whilst there are a number of Rangers stars teetering on an exit. Come Saturday morning things could look a lot different at both Ibrox and Celtic Park but before then, the two clubs could do battle in the transfer market. That’s because reports in Italy are suggesting that Celtic are considering a late move to hijack Rangers interest in a leading Croatian international. RE…