Real Madrid are reportedly wary of the threat that the 'wonderful' Matt O'Riley will pose for Celtic in their much-anticipated Champions League clash.

The Lowdown: Huge night awaits at Parkhead

The Hoops face one of their biggest matches in years on Tuesday night, with European champions Madrid making the trip to Parkhead.

It promises to be a deafening atmosphere and Ange Postecoglou's side will be dreaming of a huge shock following a superb start to the season.

It will be a night where every Celtic player will need to perform but O'Riley will be a key figure, having already provided five assists in just six Scottish Premiership appearances this season.

The Latest: O'Riley singled out

Madrid newspaper AS [via Sport Witness] write that the 21-year-old is a player for Carlo Ancelotti's side to worry about, given his 'wonderful' quality:

"He is physically very powerful, he is about 1.90 tall, and he has a very fine kick with his left leg. Last Saturday he gave two assists in the resounding victory against the ‘enemy’ Rangers; one of them, for Jota, was wonderful."

However, they also pinpoint the big weakness for the Bhoys, believing their defence will not be able to stand up to the quality on show from Madrid.

The Verdict: Massive occasion for youngster

This is surely the biggest game of O'Riley's blossoming career to date - one that represents a wonderful chance for him to showcase his talent on the biggest club stage of them all - and it is exciting to see the mighty Madrid single him out as a threat.

The young midfielder will likely come up against two of the best of their generation in Luka Modric and Toni Kroos, but he should embrace the challenge with open arms.

Postecoglou has urged his team to approach the game in a fearless manner and O'Riley must heed his manager's words, not being overawed and simply playing the way he has all season to date. It's easier said than done, but he is more than capable of standing out on a massive night.