CRISTIANO RONALDO will face Manchester United for the first time since he left Old Trafford after Real Madrid were drawn against his old side in the last 16 of the Champions League.

The tie will also pit Jose Mourinho against Sir Alex Ferguson in the most mouthwatering tie of the first knockout round of Europe’s top club competition.

Arsenal take on Bayern Munich while Celtic meet Italian champions Juventus.

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Celtic boss Neil Lennon called his side’s draw against Juve ‘‘a beauty’’ but very tough.

Lennon said: “Well in terms of glamour it’s a beauty. Juventus are one of the great traditional European teams.

They’re current Italian champions and finished the group stage very strongly.

‘‘So in terms of glamour it’s great, in terms of qualification it is going to be very tough, but it could have been any of the other teams and it would have been just as tough.’’ Barcelona will take on familiar foes AC Milan with the first leg at the San Siro.

German champions Borussia Dortmund face a tricky clash with Shakhtar Donetsk while local rivals Schalke take on Galatasaray.