In Jon Wertheim’s latest mailbag, he breaks down Serena Williams’s retirement announcement, Nick Kyrgios’s unconventional attire and game’s future without its biggest stars.

Hey everyone…

Housekeeping:

• Murphy’s Law, tennis corollary. When you take a week off for vacation, one of the sport’s titans announces her retirement. Herewith some thoughts on Serena.

• Here’s a Tennis Channel video in tribute of Serena (h/t Brett Danzer, the producer who did the heavy lifting putting it together.)

• New York readers, here's a local tennis tournament before the U.S. Open

• Colette Lewis has you covered from the Kalamazoo Junior championships

• All hail Coco Gauff, the new world No.