Monica Seles

Since I retired, I very much enjoy watching Serena Williams play. While I was playing, she was one of the toughest players I ever faced. Her ground strokes are so solid, her serve is one of the most powerful in women's tennis, and mentally she is just so strong.

On the other end of the spectrum, these women who do live long enough to collect Social Security face the challenge of being disproportionately dependent on the Social Security system for retirement income.