Speaking to the Daily Mail last week, Wolff described the now-retired Rosberg as "the vicious one" in his rivalry with teammate Lewis Hamilton.
"I know what Toto really thinks about me, so I don't care what an English newspaper writes," Rosberg told DPA.
"Last Tuesday, we collected €600,000 for blind children at a charity event together.
"From time to time I read what is on the internet but this chapter is closed for me. It's funny because it just doesn't affect me any more. I won my battle."
Rosberg announced his shock retirement just five days after winning the championship in 2016.