ROGER FEDERER

I don't invest in things I don't understand or don't use myself.

On Running wasn't just an investment. I genuinely love the product. That matters more than any spreadsheet.

Elegance and simplicity are underrated in both tennis and business.

I've lost almost 400 matches in my career. People only remember the wins. That's the unfair advantage of being consistent.

The best investment you can make is in relationships. Everything else follows from trust.

Retirement isn't the end. It's just the second serve.