ترجمة - انجليزي-فرنسي - Important! During a 'random-opponent match, do...

This is a warning inside an iPhone game, that warns the user not to send the application to the background (or in other words: switch to a different app) or answer any phone calls on their iphone during a "Random Opponent" match. Or else: they will lose the game, and their coin stake (bet).

I chose: "adversaire au hasard" for "Random Opponent".