At the weekend, Arsenal manager Arsene Wenger operated with a 4-2-3-1 formation with Aaron Ramsey and Thomas Rosicky playing just behind Alex Oxlade-Chamberlain, Jack Wilshere and Theo Walcott. But those plans could be scuppered tonight with two of the players who started that game, Ramsey and Oxlade-Chamberlain, set to be ruled out. Ramsey is a doubt after picking up a knock against Villa while Chamberlain is out for up to six weeks after coming off at the weekend, which is a huge blow to Wenger's plans tonight and in the future. Arsenal also continue to be without Mikel Arteta, who remains sidelined with a thigh complaint. That could mean a return to action for Santi Cazorla, who made only a cameo appearance against Villa, while youngster Emmanuel Frimpong has also travelled with the squad to Turkey. Rosicky, Cazorla, Wilshere, Walcott