Josy Comhair made this known through a press release with detail explanation of how the matter evolved.
According to the statement, Comhair pointed that de Zerbi has explicitly told Trossard that "a transfer is the best solution".
Official statement by Leandro Trossard agent Josy Comhair after Belgian star excluded for next game by Roberto de Zerbi ??? #BHAFC— Fabrizio Romano (@FabrizioRomano) January 13, 2023
“The manager humiliated Leandro in the group — also he indicated that a transfer is the best solution” ⤵️ pic.twitter.com/iVhbjKp04j
The full statement goes, “After the World Cup there was an altercation at training between Leandro and another player over an inanity.
“Since then, the trainer has not spoken to Leandro, which is obviously not conducive to the atmosphere, as well as performance-wise.
“Leandro still was a first-eleven player against Southampton and Arsenal but against Everton he was on the bench.
“In the five substitutions that took place then, he was also not among them and this is without any explanation.
“In the run-up to the match against Middlesbrough in the FA Cup, Leandro had already reported calf problems twice. This was the reason he stopped training.
“This was in consultation with the medical staff. Through the physical trainer, Leandro learned that he had to train separately.
“Last Monday the trainer then grounded Leandro in the group and indicated that he did not want to see him anymore.
“A trainer who has not communicated directly with his player for four weeks is truly incomprehensible.
“It is also the trainer who has indicated several times that a transfer is the most reasonable solution.
"It is therefore important that Brighton cooperates with a potential transfer, which is beneficial for both parties.”
Speaking in his press conference on Friday, De Zerbi failed to be drawn into speculation over Trossard’s future where he stated the player is unavailable to face the Reds.
He said: “Leandro isn’t in the list of the players for tomorrow. Leandro knows very well my opinion.
“The last training session before the Middlesbrough game, when he understood he wouldn’t play, he left the session without saying anything to me and it’s not good.
On the Monday, I spoke with him and I explained I don’t like this attitude, this behaviour.
“He knows very well if he wants to play with Brighton with me, he has to work hard, he has to run, he has to be in the right way.”