1 vs 1 Soccer strips football down to its simplest form: one player against one rival on a small pitch. There are no teammates to pass to and nobody to blame, so every goal you score and every goal you concede is down to you.
Take control of your player and try to beat your rival. Win the ball, get past your opponent and put it in the net, then get back in time to defend your own goal. The player with more goals when the match ends wins.