The 17-year-old Borussia Dortmund and US national team attacker was reportedly the subject of an £11 million bid from Liverpool during the final week of the summer transfer window.
The midfielder moved to Napoli this summer, despite constant links with the Reds.
Rangers boss Mark Warburton will not be expected to play the 18-year-old at Ibrox anytime soon.
Mark Warburton’s Glasgow Rangers will face Old Firm rivals Celtic at Celtic Park in the Scottish Premiership after the international break.
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The Antigua and Barbuda international left Nottingham Forest yesterday.
Speculation has been growing over the future of West Bromwich Albion boss Tony Pulis.
With the summer transfer window closed, Jose Mourinho has one eye to January in case he needs to make improvements.
Xabi Alonso was a key member of Liverpool’s side under Rafa Benitez.