The lineups for the Champions League Round-of-16 match between Barcelona and Arsenal have just been announced, for the kick-off at 19:45 GMT/2:45 EST.
Arsenal forward Robin van Persie gets the starting nod.
In another perhaps surprise move, Brazilian defender Adriano will be starting for Barcelona.
Guardiola uses a 4-3-3, while Wengers goes with basically a 4-2-3-1.
This will be a big test for van Persie. He's starting the match but how effective will he be?
Here are the starters for Barcelona:
D: Adriano, Abidal, Busquets, Alves
M: Iniesta, Mascherano, Xavi
F: Messi, Villa, Pedro
Here are the starters for Arsenal:
D: Clichy, Koscielney, Djourou, Sagna
M: Wilshere, Diaby, Nasri, Fabregas, Rosicky
F: Van Persie