Jannik Sinner's Knee Drama: Will He Miss Six Kings Slam?

Jannik Sinner's knee is throwing a tantrum! After missing the US Open and bailing on the Shanghai Masters, fans are biting their nails. He might skip the Six Kings Slam starting October 21, which would be a huge bummer since he usually cashes in big time! Organizers are already eyeing Medvedev, Fils, or Shelton as backup plans.