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He played 11 seasons in the league, including with the Nets and Celtics, and made history as the first professional athlete to publicly come out as gay — Andy Adler goes one-on-one with Jason Collins.

His guilty pleasure? Believe it or not, it’s tennis.

“If there was a basketball game on or a tennis match, like a really good Naomi Osaka, Serena Williams march, I’m watching Naomi Osaka – Serena Williams match,” he said.

His biggest insecurity? His hair.

For more on his thoughts on basketball, including the Nets-Celtics series, watch the video above.