Tournament organisers have been given permission to sell 1,000 tickets for Friday's European Challenge Cup final between Bristol and Toulon.
The game takes place in Aix-en-Provence, which is around 20 miles from Marseille, at the 6,000-capacity Stade Maurice David.
In a statement, European Professional Club Rugby said: "A limited number of fans will be able to attend the Challenge Cup final after authorities in the Bouches-du-Rhone department granted EPCR permission to sell 1,000 tickets for the showpiece match in Aix-en-Provence.
"EPCR is committed to ensuring that all matches in its tournaments are staged in line with public health guidelines in order to prioritise the safety of stakeholders.
"And the advice for supporters hoping to attend Friday evening's final is that they should not travel long distances."
Saturday's Heineken Champions Cup final between Exeter and Racing 92 will take place behind closed doors at Ashton Gate in Bristol.