Only one other batsman managed to hold off South Africa's pace bowlers on a Wanderers pitch that has been playing typically tough for batsmen. In just two days, 24 wickets have fallen.
The second Test starts on January 3 in Johannesburg.
Du Plessis' career-best score sent South Africa to 621 all out at SuperSport Park on Day 3.
The players, led by Quinton de Kock, raised their firsts after singing the South African national anthem before the start of the opening day at the Super Sport Park.
The BLM has gripped the world since the killing of African-American George Floyd's earlier this year in the US.
The wicketkeeper-batsman, who leads the side in white-ball cricket, was named the skipper of the Test team earlier this month by Cricket South Africa (CSA).
The tests, which form part of the CSA's Covid-19 protocol for the tour, took place on Wednesday and Thursday.
De Kock will lead the Proteas in series against Sri Lanka, Pakistan and Australia respectively.
The two positive tests, along with an outbreak in the South Africa camp and among workers at their shared bio-secure hotel in Cape Town prompted the rest of the tour to be abandoned on Monday.
The decision has been taken by CSA and the ECB as they await the outcome of the independent ratification of the two unconfirmed positive Covid-19 tests from the England camp.
The ECB did not release any names and didn't say if the two members were players or officials.
The decision was taken by both the England Cricket Board as well as the home board, Cricket South Africa.
A South Africa player has tested positive for COVID-19 ahead of the limited-overs series against England.
The Proteas will play England in three T20Is and as many ODIs from November 27 to December 9. It will be followed by two Tests against Sri Lanka from December 26 to January 7.
The statement from sports minister Nathi Mthethwa said he had informed the International Cricket Council of the intended action.
Two players from South Africa men's cricket team will miss the specially-arranged four-day culture camp after testing positive for coronavirus.
The South African women's team, which last played at the semifinals of the T20 World Cup in Australia in March, was scheduled to play four ODIs and two T20Is in a bio-secure environment in England.
The series was initially set to be held in the Caribbean Islands between July 23 and August 16 and would have involved two Tests and five T20Is.
The South African team was scheduled to tour the Caribbean to play two Tests and five T20s from July 23 to August 16 but the visit was postponed due to the COVID-19 pandemic.
Tahir moved to South Africa and ended up playing for its national team while also representing various franchises in T20 league the world over.
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