Uefa has launched an investigation into the conduct of both Valencia and Inter Milan following the post-match brawl which marred their Champions League clash.
Valencia substitute David Navarro sparked the melee after punching Inter's Nicolas Burdisso - breaking the Argentinian's nose in the process - with players from both teams quickly becoming involved.
The disruption continued in the tunnel with Inter players attempting to get into the Valencia dressing room to confront Navarro.
A Uefa spokesman said this morning: "An investigation has been opened for the incidents which happened last night against both clubs.
"A decision is expected at the next meeting of the Uefa disciplinary body on March 22nd."
The second leg of the last-16 tie finished goalless with Valencia progressing on away goals following the 2-2 draw at the San Siro on February 21st.
Navarro apologised for his part in the incident, telling Spanish radio station Cadena Ser: "I saw that they were trying to attack a team-mate, and I lost my nerve.
"I have never behaved in this fashion before, and I will never do it again. I am very sorry and ashamed."
Navarro, who intends to contact Burdisso to apologise in person, added: "I have not yet been able to see the images (of the incident), nor the reaction of the Inter players in our changing room. I was in another room.
"It has been a lamentable incident. On Wednesday I want to apologise to those affected by my actions."
Valencia coach Quique Sanchez Flores said: "I hope that the punishment is minimal and affects us as little as possible.
However, Inter coach Roberto Mancini was less than impressed with how events unfolded and branded Navarro a coward.
He told www.inter.it: "I didn't see anything because I was the first person on my way back to the dressing room.
"The boys told me what had happened after.
"Now I have seen the footage, I can say that the Valencia player is a coward.
"There's nothing else you can say about someone who throws a punch like that then runs away."
Inter president Massimo Moratti admitted the post-match brawl was a surprise but added that Inter would not be taking the matter further.
"The Uefa delegate will do what he has to do. But I don't think Inter will take any further action."
