Michael Stewart has admitted that he would be "very surprised" if Rangers were not considering a move for a striker like Lawrence Shankland.
The former Hearts midfielder turned pundit declared that the Scotland international is ready for the "step up" to the Scottish Premiership title contenders for the run-in - as he insisted there were major question marks around Cyriel Dessers.
The Nigeria international has struggled to find top gear since arriving at Ibrox - and despite finding the net against Dumbarton left many fans frustrated as he passed up a host of chances during the Scottish Cup clash.
In contrast, Shankland is the leading scorer in the Scottish Premiership - with Hearts desperate to keep their star man as they push for third spot in the table and guaranteed European football.