Arsenal have joined the clubs following Barcelona B defender Mikayil Faye ahead of a potential summer move.
Mail sport revealed last month that Manchester United, Bayer Leverkusen and Bayern Munich have all checked on the powerful young centre half who can also play at left-back.
United scouts saw the 19-year old score a spectacular goal on his international debut for Senegal against Gabon in March and he followed up with a thunderous free-kick for Barcelona Atletic against Osasuna a week later.
He has been included in Barcelona first team squads and he is expected to get a call up before the end of the season with head coach Xavi tipping Faye to have a bright future.