Alexis Sanchez starts as a lone striker for Arsenal as they host Besiktas in the second leg of their Champions League qualifier.

The £32m Chile international is trusted to lead the line up top, while Per Mertesacker partners Laurent Koscielny at the heart of the Gunners' defence.

Former Chelsea and Newcastle United striker Demba Ba starts for the Turkish side, while Atiba Hutchinson comes in for Necip Uysal following last week's 0-0 draw.

Arsenal: Szczesny; Debuchy, Mertesacker, Koscielny, Monreal; Wilshere, Oxlade-Chamberlain, Flamini, Cazorla, Ozil; Sanchez

Besiktas: Tolga; Ismail, Pedro, Ersan, Motta; Veli, Atiba, Mustafa, Oguzhan, Olcay; Ba

You can catch live commentary of the game here.