Serena Williams  is a tremendous athlete. 

When she retires, it is likely that she will be considered the best female tennis player of all time.

Consistency of her dominance. She’s been winning slams since her teens (doubles) all the way to her mid to late 30s

She is a Great tennis singles player and almost as dominant in doubles when she chooses to play

Icon status, one of the highest paid female athlete in the world with a huge pop culture influence.

She has the most slams in the Open Era of Tennis (even more than Roger Federer)

She could easily have had more slams if she wanted.

Greatest athlete is a bit far though. Maybe greatest tennis player.

What Do You Think? Let's have your opinion.