Rookie David Siem wins the Open de France at Le Golf National . Siem holds off late charge from Francesco Rossi to win by one shot . Lee Westwood fine after an injury sustained during Saturday 's round . Rookie Chris Thompson becomes the Tour 's sixth first - time winner of 2012 .
German Marcel Siem wins the Open de France at Le Golf National . Siem holds off late charge from Francesco Molinari to win by one shot . Lee Westwood fine after an injury scare during Saturday 's round . Rookie Ted Potter becomes PGA Tour 's sixth first-time winner of 2012 .