The talented winger has agreed to join for a £27million fee and the deal was made official last night.
He fell out of favour at Brighton under manager Roberto de Zerbi after the player’s manager demanded a transfer for Trossard this January.
But club legend Ray Parlour is struggling to see how Trossard will break into the first team ahead of Bukayo Saka and Gabriel Martinelli.
He may find his game time hard to come by and Parlour believes the Belgian has taken a gamble with his move.
“Certainly, he’s a good squad player,” Parlour told talkSPORT of Trossard. “He’s not going to be starting in front of Saka and Martinelli at the moment. [Emile] Smith Rowe’s on the bench at the moment, another quality player.
“If you look at Manchester City’s bench when they bring top stars on, it’s littered with unbelievable players, which is different to Arsenal’s bench. They needed someone. Obviously, they missed out on Mudryk to Chelsea and they needed a reinforcement.”
Parlour added: “It’s a gamble but he’s got big money and big contract so good luck to him. I think they (Arsenal) were always looking for a winger.”