This is what Stefanos Tsitsipas learned from a thorough thrashing dispensed by world No. 2.
Mac's mea culpa to Roger Federer includes "tribute" song."
"The pressure of the moment got to her," says John McEnroe of Serena Williams.
Carlos Silva, who formerly led the Professional Fighters League, is named World TeamTennis CEO.
Both women's semifinals, followed by Nadal and Tsitsipas. Plus doubles semis, boys' and girls' singles quarters and more! All on tap for Day 11 in Melbourne.
US Open champion on key to AO semifinal surge.
Serena offers straight-forward reason for her shocking collapse to Karolina Pliskova.
