Ninis, now 20, has been constantly linked with a move away from the Athens based club with his destination most likely to have been Italy with Roma and both Milan clubs said to be fighting it out for his signature.
It now seems that Sir Alex has won the race for the 11 cap play~making midfielder. Premiership rivals Arsenal were also thought to have been keen on bringing Ninis to English soil but have since highlighted other targets.
A fee of around £9.6 million is thought to have been accepted for the player. It is expected that United will let the player stay on at Trifylli for another season in order to aid his development.
Follow Steve Featherstone on Twitter @FeathersWorld
Click here to comment on this articleor
Give us feedback on your Football Transfer Tavern experience