'Fear' works as a motivating factor for Matteo Berrettini - the fear of losing, fear of missing out.
"Fear is part of my life, my career. I think everybody's life," the US Open's 13th seed said.
"For me fear is a big engine, it's something that helps me get up in the morning and achieve goals," the 26-year-old said. "Without fear I wouldn't be here. "
Berrettini, who'll play Casper Ruud in the quarterfinals on Tuesday, trails the Norwegian 2-3 in head-to-head clashes.
"You have to be able to handle fear and overcome it," he said, adding, "otherwise it's gonna be tough. You're not gonna enjoy it."
"When I'm not tight, when I don't have fear to lose, I don't have something I can miss, I never feel good," the Italian said "When I feel it, I don't like it (right then), but I know eventually I'm gonna like it. It's kind of like a little screwed up, but it works."
