Who are the greatest female tennis players of the open era? For our purposes, this list includes some of the best female singles tennis players since the Open Era officially began in 1968. Some of these brilliant female tennis players have long since retired since winning countless major tournaments, but some continue to make headlines with their awesome skill on the court. Vote for the tennis playing women you believe are truly the best since the Open Era began, and vote down any that you don't think qualify. Also, feel free to rerank this list in any order you want. Debate about who is the greatest female tennis player of all time (Open Era or not) continues to this day, with some arguing that the honor goes to Steffi Graf, and others saying the title belongs to the incomparable Martina Navratilova. In their day, these two female tennis players were feared and revered by opponents, and with good reason. And certainly, no list of the best and greatest female tennis players of the Open Era would be complete without Serena Williams: She is arguably one of the, if not the absolute top current female tennis players in the world. Serena's sister, Venus Williams, also makes this list. If you're a tennis fan, you might also want to cast your vote (or rerank your own list of) the greatest male tennis players of the Open Era. Is Roger Federer the best, or should the honor go to Bjorn Borg? You decide, with your votes.