One other comment about Chris Evert's awesome and extraordinary clay court dominance. As devastating as she could be on all clay surfaces, barely yielding games to anyone, on a number of occasions she did have one match where a player did test her, or where Evert was pushed - and as the case with Stove - not necessarily by a player who one might think could really challenge Chris on clay.
One example: At the 1978 Family Circle Cup, where Chris waltzed to her 5th consecutive title, she lost a total of 15 games in 5 matches. That in and of itself is dominating. But one player won almost half of those games: Renee Richards! I believe it was their first ever meeting - and Chris sometimes let opponents get into her head a little bit. I suspect Renee held some sort of mystique for Chris at the time. (Evert did comment that she wasn't entirely comfortable with Renee on tour, but nothing vehement like other players). Renee was a veteran, but certainly not one of the quickest players, nor did she possess a great clay court game. Yet in the 78 FCC, Richards won more games than anyone off Chris in 3 years, save Betty Stove who won 1 more game than Renee. It could have been a case of Evert playing overly cautious against Renee, seeing as Chris lost 7 games. Evert's 4 other opponents in the tournament won a combined total of 8 games from Chris. The vanquished were: Beth Norton 6-1,6-0; Mima Jausovec (the reigning French champ and the player who gave Chris her toughest match the prior year's FCC) 6-0, 6-1; Tracy Austin in the SF 6-3,6-1; Kerry Reid in the F 6-2,6-0.
Also: JoAnne Russell was no slouch on clay (she grew up in Florida on clay), but in summer 1980 she didn't really have weapons to hurt Chris on clay, yet she won 8 games off Chris in their 2R match at the 1980 US Clay Courts. Which is more than Andrea Jaeger won off Chris in the F, and more than 3 other opponents combined.
Bettina Bunge was an all around player, who had decent success on clay. But she always had a tough time against the top players (she never beat Chris, Martina, or Tracy). However, 16 year old Bettina nearly derailed Chris at the 1980 French Open R16, barely losing 4-6,6-4,6-3. Bunge also won 8 games off Evert in the SF of the 1982 Murjani (Amelia Island) event; which was double the number of games Jaeger won off Evert in the F. Chris' 3 other opponents in the event won a combined 9 games from Chris.
Kathy Horvath scored one of the biggest clay court upsets ever when she stunned Martina Navratilova in the R16 at the 1983 French - a loss which turned out to be Martina's only one for the entire year. But 2 years earlier, after Kathy nearly registered an upset of greater significance when she was trouncing Chris in the 3R of the 1981 Italian Open, leading 6-2,5-2! Horvath was just 16 at the time, and ranked #44. Horvath had 2 match points, but faded failing to convert her 2 golden tickets, losing 2-6,7-5,6-1.