That's what I like about Federer, Nadal and Djokovic, three out-and-out champions who are so gracious and respectful in victory and defeat alike and all three who are class acts on and off the court.
Serena has a lot to learn from them, but I am not holding my breath on her changing this late in her career.
In any case congratulations to Naomi Osaka, a fantastic performance with many more major wins in Grand Slam events coming her way over the next 10-20 years.