Dave Portnoy on his newfound love for tennis and Aryna Sabalenka

Aryna Sabalenka is keeping busy in the offseason so far on the beach and in the boardroom.

The world No. 2 spent the first week of her offseason vacationing in Los Angeles and signing an exclusive deal with the sports memorabilia company Leaf Cards for her own limited line of autographed trading cards.

"Leaf is thrilled to announce our exclusive partnership with Sabalenka for the creation of her inaugural trading card–a momentous occasion in the world of collectibles," Leaf wrote on its website. The cardmaker has also signed deals with pickleball world No. 1 Anna-Leigh Waters and UConn women's basketball star Paige Bueckers this year.

With only 25 available in the release, the autographed cards have already sold out on Leaf's website, but fans of Sabalenka can still order a base card through Nov. 17.

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With her stock rising, on and off the court, after a breakout 2023 season, Sabalenka says she's taking "a lot of lessons" from the year into 2024 and beyond.

"I had a lot of lessons this season," she said after losing to Iga Swiatek in the semifinals of the WTA Finals in Cancun. "A lot of tough losses. A lot of great wins. Becoming world No. 1 ... It's not about ranking. I feel like those tough matches, this is something you need sometimes to learn. I'll just keep working.

"I feel like I'm moving in the right direction, I just have to stick to our plan and just keep going. Just forget the negative side of the season, focus on the positive and just keep working, keep getting better."