MANCHESTER UNITED and Arsenal are keeping tabs on two Olympiacos wonderkids ahead of the summer transfer window.
Both teenage sensations are part of the Greek giants’ exciting new generation that won the Uefa Youth League with the Under-19s last season.

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Babis Kostoulas and Christos Mouzakitis were among the main protagonists of that historic triumph the saw them becoming part of the first ever Greek team to win a European title, shortly before the seniors conquered the Europa Conference League.
Both of them were quickly promoted into Olympiacos’ first team under manager Jose Luis Mendilibar last summer.
Highly-rated forward Kostoulas, 17, has so far amassed a total of six goals and two assists in 33 appearances with the Piraeus outfit this season.
And rising midfield star Mouzakitis, 18, has registered two goals as well as four assists in 30 appearances across all competitions.
SunSport understand that their ongoing rise to prominence has led to interst from Man Utd and Arsenal, but both Premier League giants are facing competition from a host of European rivals.
The pair are also being monitored by Aston Villa, Borussia Dortmund, AC Milan and Juventus.
Tottenham, Chelsea and Bayern Munich are reportedly keen on Kostoulas, while SunSport can reveal that the Greece Under-21 international – soon to be a senior – has received interest from Spain.
We can also report that Brighton, Wolves, Villarreal and Atletico Madrid are eyeing Mouzakitis.
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The midfielder stood out during the international break as he made his first ever start with Greece in Scotland and helped his team climb up to League A in the Nations League with a stunning 3-0 win.
Kostoulas missed out on a call-up by manager Ivan Jovanovic due to a hamstring injury he suffered three weeks ago.
But he is in contention for Sunday’s crunch derby against rivals Panathinaikos.