Arsenal legend Paul Merson reckons Premier League giants have reservations over Jack Grealish's ability to control midfield - and believes he needs to earn their "trust" before leaving Aston Villa.
Mirror Sport revealed last month that Manchester United boss Ole Gunnar Solskjaer is prepared to pay up to £70million to land the Villa skipper.
The attacking ace has been in superb form for relegation-threatened Villa this term after inspiring them to promotion last season.
But Merson, who had a four-year playing spell at Villa Park, has concerns about Grealish - because he has been carrying his boyhood club all season.
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