The wing player only moved to Como van Real Betis in January, but he has already had an impressive impact on the Serie A club.
And Diao has now linked its form to United, news that now reaches Cesc.
The Como coach said: “We are trying to go for young, talented players who did not play: they are doing well here and of course their value is increasing.
“There is no mentality of speculation and selling, they come here to grow and improve the team. Then Manchester can clearly ask to ask Diao by offering € 40 million, but it is not obvious that he will leave.”