The 18 year old joined the Reds in the Summer from Paris St Germain and has been one of the reserves' best players so far this season. He has certainly impressed McMahon.
"Chris has shown a lot of good things in his game and he has been fantastic all season," said the reserve team boss.
"He is new to this country and he couldn't speak a word of English at the start but he has worked really hard to adapt here and learn the language quickly. What was really pleasing for me was he was constantly talking in English against Everton.
"He covers well and he can tackle. There's still a lot of work to be done with him but there's a lot of positives.
"He gets on really well with the other players and he is well liked. He is a nice lad and he has fitted in well."
