The hour is upon us.

Arsenal and Barcelona are currently in the dressing rooms at the Nou Camp getting ready for tonight's massive Champions League game.

A massive boost for Arsenal comes in the form of Robin van Persie and Cesc Fabregas both starting for the Gunners. A bit of a surprise comes in the shape of Tomas Rosicky starting ahead of Andrey Arshavin, perhaps for his more defensive edge. 

Barca XI v Arsenal: Valdes, Alves, Busquets, Abidal, Adriano, Xavi, Mascherano, Iniesta, Pedro, Messi, Villa.

Arsenal XI v Barca: Szczesny; Sagna, Djourou, Koscielny, Clichy; Diaby, Wilshere; Nasri, Fabregas, Rosicky; Van Persie.

Arsenal Comment will be bringing you all the goings on from Spain via live commentary starting at 7:30pm, you don't want to miss it.