He didn't win everytime:
"However on 23 April Marseille himself was shot down during his third sortie of that day by Sous-Lieutenant James Denis, a Free French pilot with No. 73 Squadron RAF, flying a Hawker Hurricane. Marseille's Bf 109 received almost 30 hits in the cockpit area, and three or four shattered the canopy. As Marseille was leaning forward the rounds missed him by inches. Marseille managed to crash-land his fighter"