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South Africa's hopes of getting back into the first Test against England suffered a major setback when pace spearhead Dale Steyn suffered a shoulder strain.
Steyn sustained the injury bowling at the start of England's second innings and will be sent for scans after play finishes.
With South Africa's line-up missing a genuine fourth seamer, and a 89-run first-innings lead to overcome, Steyn was surprisingly sent back out to field within minutes of leaving the pitch mid-over and in obvious discomfort.
That was a risky measure for South Africa, who clearly decided they could not afford him to be absent for too long - thereby affecting his availability to bowl later, should he be able to.
Steyn missed the last three matches of South Africa's Test tour in India with a groin injury and came through a vigorous fitness test before lining up on Boxing Day for the start of the England series.