Arsenal line up confirmed: Sanchez starts, Iwobi in midfield, Nelson & Wilshere on bench

There are nine changes from the starting XI which beat Bournemouth 3-0 on Saturday.

Only Hector Bellerin and Nacho Monreal keep their place in the team.

Into the side comes the likes of David Ospina in goal, Alex Iwobi in central midfield and Alexis Sanchez up front alongside Olivier Giroud and Theo Walcott.

Jack Wilshere makes his first appearance in an Arsenal squad for over a year.

Young star Reiss Nelson joins Wilshere on the Gunners bench.

Arsenal: Ospina; Holding, Mertesacker, Monreal; Bellerin, Iwobi, Elneny, Maitland-Niles; Walcott, Giroud, Sanchez

Subs: Macey, Wilshere, Mustafi, Jeff Reine-Adelaide, Kolasinac, Akpom, Nelson

Cologne: Horn, Heintz, Hoger, Zoller, Hector, Cordoba, Bittencourt, Mere, Klunter, Lehmann, Rausch

Subs: Kessler, Sorensen, Risse, Jojic, Osako, Guirassy, Horn