Smith hit by Nortje bouncer, misses fielding duties on Day 4; Australia await update

Australia suffered a potential injury scare on Day 4 of the first Test against South Africa in Durban on Monday after Steve Smith was struck on the helmet by a short-pitched delivery from Anrich Nortje. The former Australia captain underwent an on-field concussion assessment and did not take the field when South Africa began their second innings.Steve Smith undergoes concussion assessmentSmith was tested for concussion by Australia's team doctor and physiotherapist, and he changed his helmet before continuing his innings.