Munster have been cleared of any wrongdoing following an investigation into whether Conor Murray should have been allowed to play on after taking a blow to the head in a win at Glasgow Warriors last weekend.
Ireland scrum-half Murray was struck midway through the second half of the European Champions Cup fixture, but was allowed to continue before going off for a head injury assessment five minutes later.
The British and Irish Lions number nine was cleared to go back on for the closing stages, with Munster happy that he was not showing symptoms of concussion.
The European Professional Club Rugby (EPCR) Untoward Incident Review Group met several times to discuss Munster's handling of Murray's injury and concluded that he was fit enough to play on.
An EPCR statement read: "The opinion of the Group is that Mr Murray did not demonstrate any criteria that should have led to his immediate and permanent removal from the field of play.
"The player underwent further assessment by Munster Rugby's medical team and its specialist advisors and, as such, the decision as to when the player returns to play rests with Munster."