CFR Cluj boss Dan Petrescu believes the crux of Celtic's starting eleven may not be at Parkhead in a few years - because they'll be tearing it up in one of Europe's elite leagues.

The Chelsea legend watched his side draw 1-1 with the Hoops in last week's first-leg of their Champions League third-round qualifier.

The former full-back saw enough of Celtic's starters to know how much potential they possess.

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And he reckons the likes of Ryan Christie, Kris Ajer and Odsonne Edouard will become world class players in years to come.

Speaking ahead of tonight's second-leg, Petrescu said: "This Celtic team has some very, very good young players. 

"I'm sure in two years time they will not be here. They will be at big clubs in the Premier League or Spain.

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"I have watched all the games, I have a good eye after 16 years of coaching and 20 years of playing and I am sure of this, these players will go to the top level. 

"That's why it's going to be very tough.

"The players who will go to another level will be Ajer, Christie for sure, a fantastic player, and Edouard also. 

"But other players, they have four good players on the wing, and I heard they have six but I haven't seen them because they are too young."