Tennis players are facing an unknown opponent at the Madrid Open. A stomach virus or food poisoning has affected Coco Gauff, Marin Cilic and a few others, causing some concern.

Aryna Sabalenka has four Grand Slam titles and 86 weeks at world No. 1 to her name, but the Belarusian has already been thinking about life after tennis.

Aryna Sabalenka opens up about the business side of tennis, how she makes decisions on brand partners and then balances those requirements with tennis

Sabalenka and Carlos Alcaraz were named World Sportswoman and Sportsman of the Year, respectively, as Novak Djokovic co-hosted.

It was a big night for tennis as both Carlos Alcaraz and Aryna Sabalenka won individual awards at the Laureus World Sports Awards in Madrid.

No. 1 Aryna Sabalenka plays against No. 30 Hailey Baptiste in the Mutua Madrid Open Quarterfinal today. Fans can watch this matchup for free.

Aryna Sabalenka is through to the quarter-finals of the Madrid Open, and doesn't want to suffer the same fate as her rivals. Aryna Sabalenka is hoping to avoid picking up the dreaded virus going around the Madrid Open as she continues her title defence.