I think the racism is self evident It may be evident to you creighton but it certainly isn't to me.
You seem to have a beef about the 'tennis establishment' and I agree with many of the points you have made, but the m/netters on this thread aren't (as far as I know) movers and shakers at The All-England Club, and they can't be held personally responsible for the way certain players have been treated by the press or by officialdom at worldwide tennis tournaments.
I repeat, I'm glad the Williams' sisters have been beaten for no other reason than I find them boring to watch. In short, I don't like their games and that has nothing whatsoever to do with the fact that they are black.
I've watched film of Arthur Ashe and he was a superb player - he also happened to be the first black player to win Wimbledon, and I may be correct in saying that Boris Becker was the first unseeded player and the first German to win Wimbledon as well as being the youngest ever player to win the title, but I'm not aware of any anti-German sentiment being expressed when he won the title.
Like many others, I'll be punching the air if Murray goes out in the quarters because I don't like his style of tennis, and if it's Federer and Nadal in Sunday's final I'm going to be cheering for both of them because I love the way they each play the game - and that, for me, is what it's about.
Racism plays no part in the way that I view sporting events - and it seems to me that you're trying to create a problem on this thread where none exists, or should exist.