Brentford manager Thomas Frank has insisted that his striker Bryan Mbeumo is not for sale in the January transfer window.

Mbeumo has reportedly caught the eye of Manchester United, Arsenal and Tottenham Hotspur this winter after performing well again this season. Until this season, the Cameroonian had not scored double figures in the Premier League.

However, he has bagged 13 goals this campaign and has shown no signs of letting up. RMC Sport understands that the 25-year-old has been watched by the Premier League trio amid their respective desire to sign strikers.

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When he was pressed on whether there is a price tag for the striker, Frank insisted there was not. "No. It’ll be that big a fee that I can’t imagine the size of the fee," he explained to the media.

"I’m not even focusing on keeping my best players, I’m just expecting them to stay." United find themselves in desperate need of firepower up front this season with neither Rasmus Hojlund nor Joshua Zirkzee having been prolific.

The problem for United is that they continue to balance the worries of Financial Fair Play (FFP) penalties with the desire to improve their squad. MEN Sport understands that United must sell to buy this window with no transfer budget set for January.

Reports on Thursday suggested that Napoli had placed a £40m bid in for Alejandro Garnacho which was rejected. It is claimed that United would require a bid of £60m to be submitted before they agreed to sell their winger.

The Bees are said to want a fee in excess of £50million for Mbeumo, if reports are to be believed.