The first paragraph does not bring any value or relevance to your argument. As for the second one, it is a fact that both Murray and Federer have an extra silver to go with their gold. People have to just accept those facts.
It's proving to be very hard for some.
There is no qualifications for the term "Olympic champion". The only differentiation I would make is whether Olympics is the biggest event in the season for a spesific sport. In tennis and football it isn't, but even that doesn't matter. They all count the same in the end.