Fast bowler Kagiso Rabada revealed on Monday that the South African cricket team are training in two groups to minimise the risk of further Covid-19 infections ahead of their series against England.
Two members of the South African squad have tested positive for Covid since the squad assembled last week and two other players had to go into isolation because of their close contact with one of the infected players.
"It's been quite bizarre," Rabada told an online press conference from the team hotel in Cape Town.
"We have to train in groups - a group of non-contacts and a group of close contacts.
"It doesn't mean anyone is positive but we have to take that extra precaution."
Rabada did not reveal how many players were in each group but planned intra-squad matches on Saturday and Monday were cancelled, presumably to reduce the risk of infections.
He said more Covid tests would be conducted with the players "soon".
Despite the unusual training arrangements, Rabada said "training is going smoothly" ahead of the first Twenty20 international against England at Newlands on Friday.
"The team is doing well at sticking to strict rules."
Rabada is undergoing his second "bio-bubble" experience in a short period of time after starring for the Delhi Capitals, and becoming the leading wicket-taker, in the recent Indian Premier League in the United Arab Emirates.
There were no crowds at the IPL and there will again be no spectators at the three T20 internationals and three one-day internationals against England.
Rabada said the lack of crowds had not affected the standard of cricket in the IPL.
"The competitiveness was second to none," he said.
"The crowd gives that extra bit of adrenalin and that extra bit of drama and theatre.
"There's definitely an element missing but at the end of the day we are competitive cricketers who want to compete, to test your skill level. I think it will be much the same in this series.