Emi built on last season’s loan spell with Wolves by making five first-team appearances this time out.
The Argentine goalkeeper appeared twice during the Premier League season - following injuries to Petr Cech and David Ospina - keeping a clean sheet in a 3-0 win over West Ham United in what was his first start of the campaign.
Martinez was also the stopper of choice for the EFL Cup, ensuring shutouts against Nottingham Forest and Reading before playing in the eventual elimination to Southampton.
Emi has now amassed over 50 career appearances, taking his Arsenal count to 13 off the back of the 2016/17 season.
During November 2016, the Argentine signed a new long-term deal to extend his stay in north London, with manager Arsene Wenger stating that he had all the credentials to win the number one shirt.