Turner has been Arsenal’s ‘cup goalkeeper’ this season, but a groin injury has prevented him from playing since 20 October.
The US international has missed Arsenal’s last two Europa League games, however he is now fit and should start the club’s third-round tie against Brighton.
That’s a boost for the 28-year-old, who hopes to be the US’s No. 1 goalkeeper at this month’s World Cup in Qatar.
Arsenal manager Mikel Arteta is expected to make more changes to your team for the game against Brighton.
Cedric Soares is expected to make his first start of the season, while Rob Holding and Kieran Tierney should also be part of the defense.
Takehiro Tomiyasu is not expected to play after being injured against FC Zurich last week, but his injury I don’t think it’s that serious which will keep him out of playing in the World Cup for Japan.
Arsenal’s midfield could change completely from Sunday’s win over Chelsea, with Albert Sambi Lokonga, Fabio Vieira and Mohamed Elneny all set to play.
Eddie Nketiah is expected to lead the line and Reiss Nelson should also come into the attack. The third striker spot is up for grabs and Arteta could play Gabriel Martinelli, or give the 19-year-old Marquinhos an unusual start.
Predicted Arsenal XI (4-3-3): Turner; Cedric, Holding, Saliba, Tierney; Vieira, Elneny, Lokonga; Nelson, Nketiah, Martinelli.
Wednesday 19:45 GMT, Sky Sports
Event: Emirates Stadium
Arsenal Squad of: Hein, Ramsdale, Turner; Cedric, Gabriel, Holding, Saliba, Tierney, Tomiyasu, White, Zinchenko; Elneny, Lokonga, Odegaard, Partey, Saka, Vieira, Xhaka; Jesus, Martinelli, Marquinhos, Nelson and Nketiah.
Injured: Smith Rowe (groin)
Doubts: tomiyasu .