The point he makes in his article is valid though. Entering the French open 1990, Graf held 9 grand slams titles to Seles none. Entering Hamburg in spring 1993, Monica Seles had 8 grand slam titles and Graf 11. So out of the last 12 slam played, Seles took 8 and Graf took 2. That's a huge difference. The head to head favored Graf because she won the first 3 matches they played, Seles being a 15 year old rookie in 1989. Seles then lead the rivalry 4-3, which is close, but 3 of the 4 wins were GS finals where it matters most. Though Graf posted a great win against seles in 1992 in Wimbledon, she could not find ways to beat her at the Australian Open 1993 where she never came close to victory. So in my mind, Seles could have well continued to win at least on slower surfaces (AO, FO), Graf on grass and maybe on the USO hardcourts. It's unlikely that Seles would have gone from winning 4 of the 5 biggest titles 2 years ni a row, starting 1993 with a GS win (and losing only one match) to losing all her titles and big matches had the stabbing not occured.