Salomon Kalou's late equaliser preserved Chelsea's long unbeaten home league record and earned a deserved point against Manchester United.Ji-Sung Park put United ahead in the 18th minute after Chelsea keeper Petr Cech fumbled Dimitar Berbatov's shot. United lost keeper Edwin van der Sar to injury in the first half and Chelsea took control of a disjointed game. Joe Cole and Nicolas Anelka wasted great chances before substitute Kalou headed in with 10 minutes left.