Serena pulls out of madrid with fever #comments

Here are some possible comments:

Concerned fan: "Oh no, hope Serena recovers soon! Madrid is one of her favorite tournaments"

Tennis enthusiast: "What a bummer! Serena was looking strong in the lead-up to the tournament. Hopefully she'll be back to her best soon"

Supportive fan: "Get well soon, Serena! You're an inspiration to so many and we can't wait to see you back on the court"

Tennis insider: "Not surprising given the travel and schedule demands of the WTA tour. Serena's been pushing herself hard lately, hope she takes the time to rest and recover"

Fan of rival player: "Maybe this is an opportunity for [rival player] to make a deep run in the tournament? Either way, hope Serena recovers quickly"

Concerned about Serena's health: "Serena's been dealing with injuries and illnesses for years, hope this isn't a sign of something more serious. Wishing her a speedy recovery"

Tennis commentator: "A big blow to the tournament, Serena is a huge draw and a fan favorite. Hopefully she'll be back in action soon"