1. Steffi Graf had one of the all-time great clay seasons in 1987 sweeping almost the entire lot: Hilton Head (Family Circle Cup), Amelia Island, Berlin (German Open), Rome (Italian Open), Roland Garros (French Open), and Hamburg (Citizen Cup).
2. After Tracy Austin snapped Chris Evert's 125 match winning streak on clay in 1979, Evert calmly went ahead and started another streak losing only one match on clay in the next three years!
3. Evert and Graf are the only two players to have won each of the five big clay events still being played today (French, Italian, German, Hilton Head, Amelia) at least once. There's a group of elite players who're all missing at least one of these from their collection:
Seles: Hilton Head
Martinez: Roland Garros
Best left-right combination by a German (and that includes Max Schmeling): Steffi Graf. All she did in 1987 was knock Navratilova out of #1 and try to knock Evert out of the sport. (Mike Lupica in "The Best and Worst of Tennis in 1987", World Tennis)
"A couple of years ago, we nicknamed Steffi Graf's forehand 'Jaws'. And that music would go perfectly when she starts running in to the net, swarming on that little ball." (JoAnne Russell, during the 1988 Wimbledon final between Graf and Navratilova)