Listening to Brad Gilbert cover tennis matches at the U.S. Open — which heats up this weekend at Flushing Meadows in New York — there's no doubt about his passion for the sport he played professionally, and coached at the highest levels.
But Andre Agassi's former coach told CNBC recently he's also really passionate about trading stocks. Wall Street is "like a tennis match," said Gilbert, currently an ESPN analyst. "It's a great rush. Every day starts new. That's what I love about the market."
Since he was 18, the now 50-something California native Gilbert said he's "always been fascinated" about stocks. (He also loves to give the pro players nicknames.)
Drawing further parallels to tennis, Gilbert said he likes being the one in control. "Whether I'm right or wrong, I have no one to complain to." He said he manages his portfolio through an online brokerage account, and trades about two times per week.
"I get up early in the morning. Get my coffee. See what the market is doing," he said on "Squawk Box" last week,. He added in an off-camera interview he likes to buy stocks and options. "I don't ever play the dark side. I never short. I go into cash if I'm worried."