It is just over 12 months since Martinez, 29, surprised many, including his own family, by opting to leave the club he had been at since the age of 17 and try something new in the Midlands.
The Argentine had just enjoyed his best and most productive season at the Emirates, playing 23 times after regular No 1 Bernd Leno was seriously injured at Brighton in June 2020 and starring as Mikel Arteta's side upset Chelsea to win the FA Cup last August and so qualify for the Europa League.
Martinez was also in goal as Arsenal lifted the Community Shield later that month, only to then suddenly leave the club at the start of last season after not being given the right assurances over future playing time in north London while negotiating a new contract.
"I love everything about Arsenal. I still love them and I'm still watching the games, but I just felt like they didn't trust me like they should have," Martinez told Sky Sports when reflecting on that eyebrow-raising career change back in March.
And you can see why he felt that distrust.