US Open 2008 Day Eight photos

Fifth seed Elena Dementieva cools down during her quarter-final match with Switzerland's Patty Schnyder




Roger Federer eventually seals victory after three hours 32 minutes of nailbiting action




Roddick's fiancee Brooklyn Decker watches intently from the stands on Arthur Ashe Stadium




Actress Cameron Diaz (right) is among those enjoying Roddick's impressive performance




Roddick seals a swift 6-2 6-4 6-1 victory in just 87 minutes