At its simplest, table tennis is a sport where opponents hit a ball back and forth on a table with a low net. But, for all its simplicity, table tennis is a challenging sport with an intense mental aspect. Usually, an opponent will either play defensively (blocking strikes and wearing down the other player) or will aggressively strike balls to the other player. If you find yourself playing an opponent who's going on the offensive, use key defensive strokes. These strokes and a defensive strategy can cripple your opponent's game.