Arsenal confirm the signing of Goalkeeper Alex Runarsson on a four-year contract from French club Dijon.
The 25-year-old Iceland international (full name Runar Alex Runarsson) joined the Ligue 1 club in July 2018 and made 13 appearances for them in all competitions last season.
Alex started his career with KR Reykjavik in his home country.
He went on to join FC Nordsjaelland in Denmark, where he made 62 appearances during a three-year spell, before moving to Dijon.
With Martinez gone, Arsenal were in the market for a backup goalkeeper, with Runarsson making the move to London to fill that role in a deal worth just over £1 million (€1.1m/$1.3m).
Technical director Edu said: “We’re very pleased to welcome Alex to our squad.
We have been monitoring him for some time and from the analysis, he has strong attributes that we look for in a goalkeeper and as a person.”
Mikel Arteta added: “We want to create healthy competition for places and we look forward to seeing Alex bring further depth to the goalkeeping position.”
Runarsson arrived in England last Friday, having completed his medical in France the day before.
He spent the weekend training with the Gunners and should be available for Arsenal’s upcoming Carabao Cup clash with Leicester on Wednesday.
Leno has started both of Arsenal’s Premier League matches this season, with the Gunners collecting a maximum six points from those two matches.
Alex will wear the number 13 shirt.
Next up for Arsenal is a Carabao Cup clash with Leicester before a visit to Premier League champions Liverpool next Monday.