Bolshoi ballet boss testifies at acid attack trial
Sergei Filin has had more than 20 operations to try to save his eyesight
The artistic director of Russia's Bolshoi ballet has begun testifying in the trial of a dancer accused of ordering an acid attack on him.
Sergei Filin, 43, suffered severe burns to his face and damage to his sight when sulphuric acid was thrown at him.
Dancer Pavel Dmitrichenko has denied arranging the assault, in a case that revealed bitter infighting at the Bolshoi.
Two other men are being tried with him over the attack in January.'Compromising material'
Mr Filin began his testimony on Wednesday by saying he was fair and transparent in distributing roles.
But he said Mr Dmitrichenko kept trying to find compromising material on him.
Prosecutors say the 29-year-old dancer colluded with ex-convict Yuri Zarutsky, who has admitted throwing the acid at the ballet chief outside his home - but insists he acted alone.
A third defendant, Andrei Lipatov, who is accused of driving the car used to transport the alleged attacker, has denied any part in the attack.