It's not as extreme as the sidestep, but the swerve is just as effective.
It is a very simple move to learn and done in the right situations, it can open massive gaps in the opposition's defence.
This is a skill all backs, especially wingers, should learn.
Run towards the defender.
Look as though you are going to run straight into the defender, this way they will start to commit to the tackle.
Hold the ball in both hands, that way the defender does not know which way you are going to move.
Start to change your line of running, arcing away from the tackler into the outside space.
Hold the ball on the opposite side to the tackler and sway your hips to that side.
Use the edges of your feet to lean away from the tackler towards the space you want to attack.
This makes it even more difficult for the defender to grab hold of the ball.
Keep your eyes on the defender as you are doing all this.
Sprint as fast as you can to make most of your off-balance opponent.
Look around for supporting team-mates in a better position than you.