Steve Smith was struck by a delivery during Australia's second innings and subsequently passed concussion tests. After not fielding during South Africa’s innings on Day 4, he returned to help his team on the final day. Smith took a catch to dismiss Kyle Verreynne and boosted Australia's chances of victory. South Africa resumed their chase needing 319 runs but two wickets by lunch. The second Test of the series is set to begin on Sunday.source https://timesofindia.indiatimes.com/sports/cricket/news/sa-vs-aus-steve-smith-cleared-of-concussion-after-helmet-blow-returns-to-field-in-durban-test/articleshow/134914893.cms