
There have been many legendary left-handers in the history of tennis, e.g. John McEnroe, Martina Navratilova, Rod Laver.
There is an instant lefty advantage because the majority of the players on tour are right-handed.
Therefore, most players haven't seen the spins and serves coming towards them from the "other side."
The biggest advantage is clearly on the serve and it looks as if Rafael Nadal has worked on that part of his game during the off-season.
Have you noticed how his service motion has changed slightly?
It seemed more fluid and explosive, at least when he warms up, even if he's not yet going all out in matches.
If Nadal can really capitalize on his left-handed serve, he will start out the rallies in a much more dominant position and also provide himself with more opportunities to periodically serve and volley.
It's not easy to alter your motion and style of play when you are the Number Two player in the world, but it's impressive to make the effort.