Bernd Leno will remain as the Gunners’ No.1 between the sticks next season.
But he will now be supported by 26-year-old Martinez following Petr Cech’s retirement.
The experienced Premier League legend has hung up his gloves and will return to Chelsea in a technical director role.
Cech made 22 appearances in all competitions for Arsenal last term as he battled Leno for game time.
The 27-year-old German, signed from Bayer Leverkusen last summer for £22.5m, eventually ensured himself as Emery’s first choice after a shaky start.
Arsenal, though, will miss Cech as he still played an important role in their run to the Europa League final this term.
Instead of signing a replacement and dipping into the transfer market, though, Arsenal will save their money and prioritise it elsewhere.
Arsenal’s decision with regards to their goalkeeper department comes as:
The defeat to Chelsea in Azerbaijan cost Emery not only Champions League football but a major boost to his summer funds.
With the Gunners only qualifying for another season in the Europa League, they must be careful with new additions.
As a result, the Mirror say previous third-choice keeper Martinez will be the new back-up.
The club are reluctant to spend money on a successor to Cech, meaning Emery has been forced into the decision.
David Ospina is still on Arsenal’s books although he is poised to seal a permanent move to Italy after a successful loan at Napoli.
“At Arsenal, though, he has only ever made 14 first-team appearances”
Argentine Martinez has been at the Emirates for nine years but first-team action has been hard to come by.
He has had six loan spells away at Oxford, Sheffield Wednesday, Rotherham, Wolves, Getafe and most recently Reading where he was the Championship club’s primary goalkeeper for the second half of this season.
At Arsenal, though, he has only ever made 14 first-team appearances – six coming in the 2014/15 season and five in the 2016/17 campaign.
His patience, however, is about to pay off as cup matches and deputising for Leno awaits Martinez in north London next term.