To effectively receive a sidespin serve from a forehand dominant opponent, position yourself slightly to the side of the centerline, anticipating the spin and direction of the serve. Keep your knees bent and stay light on your feet, ready to adjust your positioning. Focus on the ball's trajectory and contact point to decide whether to step into the shot or hold your ground. Use a stable racket face angle to counter the sidespin; a more closed racket face can help counteract the spin and reduce its effect. Aiming for a controlled return that targets their weaker side can put pressure on them and set you up for a stronger rally.