Manchester United face competition from four major clubs for Galatasaray target Ozan Kabak according to Fotomac.
The Turkish sports newspaper claim that Roma, Inter, Manchester City and Arsenal are all interested in the 18-year-old defender.
Per the source, the Lions have now reached an agreement with Kabak to extend his contract past 2020.
The report claims that the new deal will see the defender contracted to 2023.
This has not however, stopped mounting interest in the Turkey international.
Turkish-Football have United scouting the centre-back since October.
The defender has attracted widespread interest after establishing himself as a first-team star in the league and Champions League despite his young age.
The reigning Super Lig champions value Kabak as being worth €20m.
Galatasaray would have to consider offers that match their valuation due to pressure from Financial Fair Play.
The Lions cannot reinvest in the squad unless they sell players.
The Istanbul based side are desperate for a new striker after failing to replace Bafetimbi Gomis who scored 32 goals in all competitions last season.
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The young defender rose through the academy at Galatasaray before being promoted to the first-team after an injury crisis at the back.
The young centre-back impressed head coach Fatih Terim so much that he managed to keep a place in the first-team.
