I can't read Greek, so I'm guessing here. Tell me whether my suggestions change the original meaning.
instead of: "congratulations for your team winning!"
could that be:
congratulations for your team's victory!/ Congratulations for the victory of your team!
or
congratulation for your winning team! ?
Hi Lilian,
Original meaning is the same:
congratulation for your team winning!"
or
congratulation for your team's victory! (but ,this sounds better to my ears,because of the word victory=νίκη}