The 20-year-old midfielder's progress was hampered this past season by injuries and off-field issues.
Ibrox side Rangers lost to Hibernian in the final of the Scottish Cup on Saturday afternoon.
The Northern Irishman signed a 12-month rolling deal with Celtic this week.
Crystal Palace winger Wilfred Zaha believes the Eagles had chances to win the game, but it was Manchester United who were the more clinical.
The Belgian pair have been integral to Tottenham Hotspur's Premier League success this season.
It has been a bad week for Liverpool fans, but a good one for Everton supporters according to Jamie Carragher.
Under Uwe Rosler and then Steve Evans, the Whites have endured a mixed season in the Championship.
We could be about to see a very unlikely love affair on Game of Thrones.
Paul Merson suggests that West Ham United duo Mark Noble and Andy Carroll should be part of the England squad for the Euro 2016 finals.
The Portuguese is heavily expected to replace Louis van Gaal at Manchester United.
Bournemouth boss Eddie Howe has slammed West Ham United.
Harry Potter author tells Pen America gala she disagrees with calls for US presidential hopeful to be banned from the UK
Eddie Jones has poured scorn on suggestions from Toulon’s owner, Mourad Boudjellal, that Steffon Armitage has been promised an immediate route back into the England squad this year, insisting the flanker will have to move back across the Channel before he is considered for international duty and denying having spoken to anyone at the French club.