Tennis has seen a lot of fights over the years.
In an interview, Roger Federer has given an interesting opinion on corruption in sports: 'There are athletes who do well, and unluckily the bad part is there too. But sports may be doing better than before. I know there are probably still certain things in certain sports. In tennis probably not because I see there are no extra helps. It's important to have respect for others. If you do not have it, you can leave.'