The 2021 British and Irish Lions series against the Springboks could be held in the UK and Ireland if Covid-19 prevents fans from travelling.
According to the BBC, that is one of the contingency plans discussed by the Lions board in the event the tour has to be abandoned.
Instead, matches would be played in Edinburgh, London, Cardiff, and Dublin.
Springboks to play 2021 British & Irish Lions series in the UK?
The SA Rugby union has previously made it clear that a tour without visiting fans would not be commercially viable for them.
The Lions board is also thought to be unenthusiastic about the idea.
However, it is hoped that a vaccine would allow for fans to attend matches in the UK by mid-year.
In a statement over the weekend, the Lions board announced that they had been having “repeated meetings to discuss all scenarios available and is in constant dialogue”.
A warm-up contest with Japan Lions tour 2021 is already scheduled for Murrayfield in Edinburgh on 26 June.
After that, the original plan is for the Lions to travel to South Africa to play five provincial games before the three-Test series against the world champion Springboks.
The revised plan would likely see the Tests held at Cardiff’s Principality Stadium and Wembley and Twickenham in London.
Government restrictions currently forbid fans from attending, but even if restrictions are lifted, the Lions board is worried that such a large movement of people could put any Covid-19 recovery in jeopardy.
It had been mooted that the tour might be delayed until 2022, but all four home nations have Tests scheduled for that window and are said to not be keen on that switch.