Adrian Sutil on Thursday said he is ready to fight a criminal complaint lodged in Germany by Renault co-owner Eric Lux.
The Frankfurter Allgemeinen Zeitung reported late on Wednesday that Luxembourger Lux had finally filed a complaint after he was cut in the neck with a broken champagne glass in a Shanghai nightclub in April.
The SID news agency quoted Force India driver Sutil as admitting that he heard about the grievous bodily harm complaint "just from the newspaper".
He said he was calm about the impact it might have on his career.
"What will happen to me? Why should I lose my seat? This is a private matter, my job is driving.
"I'm fine, I am able to focus on my job," Sutil said ahead of the European grand prix in the Spanish port city Valencia.
"I was prepared for whatever was coming, it was just funny that it took so long."
As for the possible court proceedings, he insisted: "We want the truth, absolutely. I hope it will come to light soon. I am ready to defend myself."