INJURY doubts hang over key Cats players Chester Williams and Willie Meyer ahead of their Super 12 clash against the Chiefs on Saturday. Should the Williams be fit, he’ll come in on the left wing for Thinus Delport while Meyer, who is suffering from bad flu, is likely to be replaced by the able Dougie Heymans at tighthead. Japie Mulder might be partnered by Conrad Stoltz or Riaan van Jaarsveld in a team that is to announced on Thursday because of the fitness concerns.