On Saturday the American keeper proved he can be a difference-maker. With big saves on Tomas Rosicky and Santi Cazorla, a repeat performance is a must for Villa to have a chance. With an endless supply of firepower, and the likes of Romelu Lukako likely to start up front and looking to make his mark, Guzan is going to see a lot of action. He needs to make those big saves early on to set the pace and keep Villa in it. In short, Guzan needs to stand on his head.