Stomach virus causing havoc at Madrid Open - are shrimp tacos to blame?

Tennis players are facing an unknown opponent at the Madrid Open, with a stomach virus or food poisoning affecting numerous star names.Coco Gauff, who was knocked out by Linda Noskova in the last 16 on Monday in a third-set tiebreaker, was one player shown to be notably suffering in her victory over Sorana Cirstea in the previous round.