Celtic will face Kilmarnock at Celtic Park in the Scottish Premiership this weekend.
Tom Rogic is one of the best players at Celtic at the moment.
Former Celtic striker says Ryan Christie had a positive effect against Alloa.
Celtic lost 2-0 to the Italian giants in a friendly on Saturday night.
The Celtic man feels that the response to their Champions League defeat was "over the top".
Ryan Christie has made just five Scottish Premiership appearances for Celtic to date.
Ryan Christie has made just five senior appearances for Celtic so far.
The talented midfielder is out to impress this summer.
The youngster made just five appearances last season.
The youngster failed to establish himself in his debut season with the Hoops.