Playing in the Champions League next term is the opportunity Matteo Guendouzi does not want to miss and reason he decided not to return to the Emirates stadium.
The 23-year-old chipped in with five goals and 14 assists in 56 games in all competitions.
Marseille are understood to have paid around £9million to turn his temporary stay into a permanent switch.
Arsenal’s statement on Matteo’s departure.
“Everyone at Arsenal thanks Matteo for his contribution during his time with us and wish him all the best in this next chapter of his career.”