Bath wing Will Muir has had his appeal against a four-week ban rejected.
Muir was cited for having made contact in a reckless manner with the eye of Leinster's Josh Van Der Flier in a Champions Cup match on 11 December.
And an independent appeal committee hearing on Thursday decided the punishment was appropriate, meaning Muir will be banned until 10 January.
He is therefore due to miss matches against Gloucester, Exeter, London Irish and Worcester.
A statement from European Professional Club Rugby read: "The appeal committee was not satisfied on the balance of probability that the decision appealed against was wrong, or that the original disciplinary committee had fallen into error, and the appeal was therefore refused."