Advantage or Not
The article says not really, but I suggest that especially in the lower ranks having a left handed slice serve is a great advantage.
The other big advantage a lefty has is that right handers don't see them as often on the court and many times don't figure out they're playing a lefty until the first set is over and soon the match. Playing against a left handed player that has the strong ad court slice serve and a very strong forehand puts many right handers off their game because they tend to attack the backhand side for a right hander, the ad court, as a strategy. Doing so feeds right into the strength of a lefty forehand while this allows for a strong crosscourt play to the right hander's backhand. Add in a very strong two handed backhand like Rafa and you have a hard game play against.
If I were given a choice knowing I would be a tennis player I'd choose being born a lefty. Consider yourself lucky if you love tennis and are a southpaw.
