Cristiano Ronaldo has issued a warning to his Manchester United Football Club pals ahead of their forthcoming UEFA Champions League clash with AC Milan.

Ronaldo appeared in the final of the competition for the past two years, before moving to Real Madrid in a world record £80million transfer in the summer.

The Portuguese ace still keeps a close eye on developments at Old Trafford, but he admits he can’t pick a winner from the United v Milan tie in the second round.

“It's going to be tough for Manchester United,” he said. “I would say 50-50 because even though United have something more on paper Milan are a very tough opponent.”

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