SHANGHAI: Nikolay Davydenko swept past Juan Martin del Potro 6-3 6-2 to book his place in the Masters Cup semi-finals. Novak Djokovic advanced as the group winner though he lost his final game 1-6 7-5 6-1 to Jo-Wilfried Tsonga. The semi-final line-up in Shanghai will be completed on Friday when Andy Murray takes on Roger Federer and Gilles Simon faces late replacement Radek Stepanek in the final Red Group matches. Murray has already booked his place in the last four after the Scot notched up victories over Andy Roddick, who later withdrew from the tournament because of injury, and Simon.