The fast bowler fell awkwardly while trying to stop a boundary.
Chennai: South Africa received an injury scare as pace bowler Lonwabo Tsotsobe strained his right knee during the team's eight-wicket victory over Zimbabwe in Sunday's warm-up match of the cricket World Cup.
Tsotsobe sent down a couple of overs without success before falling awkwardly while trying to stop a boundary and was writhing in pain barely a week before the tournament gets underway.
Surrounded by worried team mates, the pacer received medical attention before eventually hobbling off the ground.
"That area of the outfield was wet and he flexed his knee and suffered a mild strain," team manager Mohammed Moosajee told reporters.
"He was assessed by the physiotherapist today and will be assessed again tomorrow morning and we'll take a call from there."
South Africa kick off their Group B campaign against the West Indies in Delhi on Feb 24.