Former Barcelona striker Martin Braithwaite is refusing to confirm Manchester United’s interest but says reports linking him with the Premier League giants is proof of what he can offer at the highest level. When the one-time Middlesbrough forward joined Barcelona on an emergency deal from Leganes back in 2020 – brought in outside of the transfer window following an injury crisis at Camp Nou – the phrase ‘once in a lifetime’ came to mind. That shows how much we know. With Manchester United looking for strikers in January – as confirmed by Erik ten Hag – HITC Football understands that the Red D…