Leinster have confirmed that all players and staff tested negative for Covid-19 in the wake of the postponement of the Guinness Pro14 game against Munster which was due to be played on St Stephen's Day.
The province added that they hoped to reschedule the fixture for early in the new year.
In a statement Leinster said, "We can confirm that all outstanding Covid-19 PCR Testing results have now been returned and all players and staff have tested negative.
"Leinster Rugby would like to thank the Pro14 Rugby Medical Advisory Group and Munster Rugby for their help and understanding and we look forward to the rescheduled game early in the new year."
It is hoped that the Thomond Park game can be rescheduled for early 2021.
The likely weeks would seem to be the last weekend in January or a blank weekend during the Six Nations although the availability of the Ireland squad members would likely be impacted in either of those circumstances.
The all-Italian Pro14 fixture between Zebre and Benetton Treviso which was also due to take place on 26 December in Parma has also been postponed after the latter club reported "a small number of positive cases of Covid-19" from last week.
On Wednesday, the Pro14 announced that the regular season would end in March before a new 'Rainbow Cup' involving four South African teams begins.
Follow Connacht v Ulster (Sunday 7.35pm) via our live blog on rte.ie/sport or listen on RTÉ Radio 1.