Centre Court's roof (to use a football cliche) could pay back a chunk of its multi-million pound price-tag today, with showers forecast on day five. Roger Federer up first at 1300 BST, with Novak Djokovic v Mardy Fish finishing us off.
Court One delights include Karlovic v Tsonga and Haas v Cilic. Serena Williams will have to put up with Court Two.
Follow it all here: