As he did in 2015/16, Wojciech spent last season on loan with Italian side Roma, helping them to a second-placed finish in Serie A.
The Poland international, who made 80 appearances in total during his two campaigns with the Giallorossi, was an ever-present last term, playing every minute of the league campaign and keeping 14 clean sheets - more than any other goalkeeper in the top tier.
Wojciech already had previous experience of going on loan - he spent six months at Brentford between November 2009 and May 2010, where he was an instant success.
He had made his Arsenal debut shortly before heading to the Bees in League One. Keeping a clean sheet in a League Cup win over West Bromwich Albion, aged 19. Upon returning from Griffin Park, the goalkeeper established himself in our first-team squad, making his Premier League bow at Old Trafford and his first Champions League appearance in a memorable 2-1 win over Barcelona.
Wojciech was joint-winner - with Petr Cech - of the Golden Glove award in 2013/14 and starts this season just two away from a half century of Premier League clean sheets. The 6ft 5in keeper is one of only four Arsenal keepers to play at least 100 times in the competition.
The son of Maciej Szczesny, a former professional goalkeeper, Wojciech has represented Poland at two major international tournaments, most recently Euro 2016, where he kept a clean sheet in a 1-0 win over Northern Ireland.