Mr Dmitrichenko, 29, was led into a Moscow courtroom in handcuffs yesterday to face trial for the assault last winter that exposed bitter rivalries behind the scenes at one of Russia's great cultural institutions.
He and two alleged accomplices face up to 12 years in prison if they are convicted of intentionally causing grievous bodily harm in the attack on Sergei Filin on January 17.
"I do not admit that I am guilty," Mr Dmitrichenko, who had dark rings under his eyes, told journalists after officers led him and two co-defendants into a courtroom cage. He looked at his parents and gave them a brief smile.
Mr Filin, whose position gives him power to make or break dancing careers, was returning home when a masked assailant called his name and threw acid in his face from a jar, leaving him writhing in the snow and calling for help.
At a hearing in March, Mr Dmitrichenko said he had wanted Filin to be roughed up, but had been shocked to learn that acid was used.
Mr Dmitrichenko, who has been in custody since March, is standing trial with Yuri Zarutsky, the alleged attacker, and Andrei Lipatov, who is accused of driving the assailant to and from the scene.
The scandal over the attack has damaged the theatre's reputation and that of its management and stars.
The trial continues.