The sun was out, Rod Laver Arena was sold out, and the stars of tennis were out. It was all for fun and a good cause, but here are 14 things I learned along the way anyway, at the Rally for Relief. *** 1. Tennis players are fun! This can be difficult to remember when you all see if them glowering, grunting, Vamosing, fist-pumping, and whinging. But let them get together, instead of pitting them against each other, and they turn totally normal. Speaking of which . . . 2. Justine Henin is a regular person: Whenever I see her interviewed, I am reminded of this semi-startling fact. She seems so untouchably intense when she plays. But put an infant, like Lleyton Hewitt’s