Manchester United's Radamel Falcao believes Manchester City counterpart Sergio Aguero is his side's biggest threat. The Colombian striker was speaking at the #HeadtoHead for Puma's 'evoSPEED 1.3' alongside the Argentine when he spoke highly of this weekend's Manchester derby opponent.

Falcao said: "They are a very talented team, with a danger all over the pitch, but Sergio Aguero has been a really dangerous player for Manchester United in the past matches.

"He scored many goals, and always needs to be watched carefully. If there is one player more than others to watch out for, I'd say it is Aguero."

Third-placed United host fourth-placed City at Old Trafford on Sunday.