The Champions League round-of-16 stage commences on Tuesday as Europe's elite attempt to forge a path to the final at Wembley.

The standout tie this week sees Cristiano Ronaldo come up against his former club for the first time as Real Madrid host Manchester United on Wednesday evening.

Elsewhere, Serie A champions Juventus are in action against Celtic, Valencia play Paris Saint-Germain, while two sides who impressed in the group stage, Shakhtar Donetsk and Borussia Dortmund, square off at the Donbass Arena on Wednesday.

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