Everton fans are not impressed by comments from Roberto Martinez this week.
The Pescara striker is also wanted by Napoli and Juventus.
The Italian striker is something of a cult figure for Rangers.
The forward scored a hat-trick against Arsenal on Saturday to boost his chances.
The Tigers have been on a poor run of form of late, as they have lost ground on the automatic promotion spots.
Rangers boss Mark Warburton doesn't want to unsettle his summer transfer targets.
The Whites lost 1-0 at Burnley on Saturday afternoon.
Leeds United lost against Burnley in the Championship on Saturday afternoon.
Slaven Bilic has praised West Ham striker Andy Carroll for his performance against Arsenal.
Burnley beat Leeds United 1-0 this afternoon.