The 28-year-old had an outstanding end to last season deputising for the injured Bernd Leno and played a starring role as the Gunners beat Chelsea to lift their 14th FA Cup.
However, the north London giants have decided cash in on Martinez, given No.1 Leno has returned from his knee problem and fully fit ahead of the 2020/21 campaign.
Martinez made it clear he would seek a move if Mikel Arteta could no longer give him assurances over regular playing time and the Argentine has reportedly agreed personal terms with Aston Villa.
However, Villa are yet to meet Arsenal’s £20m asking price this summer and Brighton have hijacked the move, according to The Guardian.
The report claims Brighton have bettered Villa’s £15m offer for Martinez and the shot-stopper will play no part at Craven Cottage as negotiations continue over his future.
Martinez held discussions over a possible new deal at the Emirates but Arsenal are now resigned to losing the ‘keeper.
‘I will say that I don’t want to comment on any individuals at the moment without having the right answers.
‘I don’t treat the goalkeeping position any differently to the others.
‘I think the one that in my opinion is training better with the goalkeeping coach has the better chance to start tomorrow and my decision will be consistent like that throughout this season.’