Rangers have reportedly lost out in the race to sign Reece Oxford.
Rangers new boy Emerson Hyndman is now going up against former team-mates Patrick Roberts and Moussa Dembele.
Rangers have been linked with a striker who could replicate the Celtic youngster's start to life in Scotland.
After their dire defeat against Hearts at Tynecastle, Warburton needed a win.
Rangers boss Mark Warburton wanted the defender at Ibrox, but he seems set for Greece instead.
Rangers boss Mark Warburton sees Crooks filling in at Ibrox.
Rangers take on Motherwell in the Scottish League Cup.
The former Liverpool manager was confirmed as the new Celtic boss last month.
Rangers boss Mark Warburton wants to take a look at Aucho before permanent Ibrox signing.
Vladimir Weiss has yet again hinted at a return to Rangers.