Following fourth-round Wimbledon exit, 17-year-old American names essential element to go deeper in Slams.
Sebastian Korda draws the positives from a fourth-round Wimbledon loss on his 21st birthday.
Undefeated on grass this season, Matteo Berrettini blitzed into his first Wimbledon quarterfinal.
All 16 singles round of 16 matches, all in one day.
"This is major stuff he's going through. I wish him only the best," says Roger Federer of Andy Murray.
World No. 338 makes history as the youngest British woman to reach the Wimbledon fourth round.
It got heated on Court 15 on Day 6 of Wimbledon.
