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Puma and Radamel Falcao were caught out by a Twitter prankster on Monday.

To promote a new advertising campaign, the sportswear company were encouraging followers to tweet them a hashtag , with selected responses winning a personalised card from Puma athletes.

Monaco striker Falcao was one such participant, but was caught out by one tweeter who craftily changed his handle for the occasion.

"LiverpoolAreW**k," wrote Falcao on the card. "Fans like you are behind every win."

The user swiftly changed his Twitter name, no doubt delighted at the ruse.

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