Garbiñe Muguruza can help Rafael Nadal make Olympic history.
The Russian will keep his current coach Vedran Martic, as well.
World No. 1 earns honor for third consecutive year.
Hall of Famer offers direct advice for Nick Kyrgios.
Martina Hingis on why former mixed doubles partner Roger Federer can master a major in 2020.
Roger Federer makes history as first living person to appear on Swiss coin.
The Dutchwoman has married physiotherapost Remko de Rijke
