Exactly. I was a big Becker fan and I am first to admit that I don't remember any great performance from Becker in Wimbledon after losing to Stich in 1991. (Except maybe beating Agassi after being down 2-6, 1-4 in 95 SF but only after discarding traditional grass court tennis and taking Agassi head on in baseline game) Many people, like 90s Clay, very questionably call Becker great rival of Pete Sampras on grass but Becker was all spent before they started meeting in Wimbledon. Even before meeting Sampras, Becker had lost to Agassi in conditions tailor made for a grass court great to whip a baseliner (fast grass, wet conditions). Yes if Sampras would have played Becker/Edberg before 92 it would have been a serious grass court competition for him.
Calling Goran has a big rival is also not true. He had great game for grass but we all know what a nut case he was. From 1990 his record at Wimbledon was SF, 2R, F, 3R, F, SF, QF, 2R, F, 4R, 1R & W. He even lost (kind of forfeited actually) to Leander Paes after leading 2-0 on GRASS, in a Davis Cup match, losing the last set 6-1.
And then there are people who say titles are all that counts. So a Michael Stich is equal to Goran as far as Wimbledon is concerned ... Right ??? Come on, have some sanity here. Sampras was one of the all time great at wimbledon. But Federer has surprassed him with 7 Wins and 2 runners up, both times losing in the 5th set to players who will be featured in all time great conversations 10 years from now.