Chris Ashton will appeal against his 10-week ban for allegedly making contact with the eye area of Ulster's Luke Marshall, Saracens have confirmed.
Ashton was cited for the incident that took place in the 16th minute of the European Champions Cup meeting, which Saracens won 33-17 at Allianz Park on January 16.
A 10-week sanction would see Ashton ruled out until March 28, rendering him unavailable for England's entire Six Nations campaign.
On Sunday, England head coach Eddie Jones called up Bath wing Semesa Rokoduguni as cover for Ashton, pending the outcome of the case, after the judicial officer found his conduct should have warranted a red card, despite the wing's not-guilty plea.
"Saracens can confirm that wing Chris Ashton will be appealing his ten-week suspension after receiving the full written decision of the independent Disciplinary Hearing Judicial Officer on Friday, 22 January," a statement read.
"Ashton, who pleaded not guilty in the independent Disciplinary Hearing in London last Wednesday (20 January 2016), will be appealing against the level of the sanction imposed."