Μετάφραση - Αγγλικά-Ρωσικά - 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).

A little contexr would be very helpful. Word "монет" represents what J-coins are, it can be omitted, if a user understands the concept of J-coins.