del Potro is in a great form and just as much dangerous as Berdych, Tsonga has had a very disappointing year and shouldn't be a threat, Tipsarevic is a clown who barely reached the tournament thanks to Nadal's withdrawal. So Fed got lucky by drawing Ferrer and not Murray. However, Federer drew Murray at US Open, in Shanghai and Bercy, so it's only fair Djoker gets Murray in London.