Oscar Pistorius' murder trial has heard the athlete's "ability to ward off danger is impaired" when he is not wearing his prosthesis.
Dr Versfeld told the high court in Pretoria, "While I would expect that he could carry a cricket bat ... I don't believe that he would be able to strike anything with that cricket bat with any type of force ... because he would overbalance and fall down."
ITV News Africa Correspondent Rohit Kachroo reports:
Versfeld is supporting the defence account of a vulnerable man. He is standing at he witness stands - occasionally glancing at his notes
Oscar Pistorius' defence will open their case on Friday and the Paralympic and Olympic athlete is expected to testify in the morning.
Oscar Pistorius was "probably not wearing his prosthetic legs" when he fatally shot his girlfriend, a forensic analyst told his trial.
Reporters discuss their views on the evidence while trays of coffee are passed along. At times it feels more like a cinema than a courtroom.