I was never a big-time boxing buff, but remember well the complete black domination of the heavyweight division once Ali (Clay) came along. I rooted for Quarry and Cooney and others but they were like the token White sprinter in an eight-man field, good but never quite good enough to triumph over the very best. And those fights were often prime time events before cable became big, watched by tens of millions of White Americans. Those frequent losses fueled the rapid growth of jokes and negative stereotypes about White athletes that the public bought into and still accept hook, line and sinker.
The Klitschkos indeed didn't seem possible nor did the White comeback in other divisions. Overall, sports has improved over the past roughly 40 years from the perspective of rooting for White athletes. In boxing for sure; golf, tennis and hockey remain White dominated in spite of the Tiger/Williams sisters outlier we've had to suffer through, Wariner, Lemaitre and now Boling in sprinting, noticeable improvements in the NFL at tight end, receiver and even a tiny bit at running back. Basketball remains a desert for White Americans but Euros continue to do well, while baseball is the sport the anti-Whites whine about non-stop because of the lack of American blacks.
It's the rest of society that has gotten dramatically more non-White, in raw numbers and especially in the fantasy world promoted by the corporate media. Sadly the Caste System has spread rapidly into every nook and cranny of Amerika.