The Ospreys' Guinness PRO14 match against Connacht this weekend has been postponed after one of the Welsh region's players tested positive for coronavirus.
Toby Booth's side were due to travel out to Galway for a clash on Saturday evening, but a number of their squad are now isolating after being identified as close contacts with the positive case.
Benetton, who lost to the Ospreys last Sunday at St Helen's, have returned a full list of negative tests.
A statement from the Guinness PRO14 read: "The game was due to take place on Saturday, November 28 in Galway, however, one Ospreys player has returned a positive case of Covid-19 and others identified as close contacts are now isolating.
"Having considered all the available evidence, the PRO14 Rugby Medical Advisory Group has deemed that this fixture cannot go ahead.
"Benetton Rugby, who played against Ospreys on Sunday, carried out routine squad testing this week and returned negative results all round.
"PRO14 Rugby will examine potential dates in early 2021 to reschedule the game."
It comes on the same weekend that the Scarlets' game against Leinster is postponed after three of the Welsh region's players tested positive.
