In her new memoir Solo: A Memoir of Hope, the 31-year-old writes: "He was often nasty, swearing at me and being harshly critical. He manhandled me in rehearsals from the start, pushing me, whacking my stomach, bending my arms roughly. One day, Maks was trying to put me in a certain position and hit my stomach so hard with his open palm that I had a red handprint there for the rest of the day."
During another rehearsal, Solo says Chmerkovskiy got so angry that he slapped her across the face so hard that her ear rang afterward. "He was extremely apologetic. I didn't care," she writes. "My ear was ringing as I walked out, shaking. I had just been hit, and I had been worried about how I would come off looking on television."
The pair finished in fourth place and appeared to have remained friends — just last week, they had a Twitter exchange after Chmerkovskiy congratulated Solo and the U.S. women's soccer team for winning Olympic gold. On Thursday, however, Chmerkovskiy cryptically tweeted, "Always hated hypocrites and liars...but when someone is both AND an opportunist, I just feel bad for them. Can't win at someone's expense."
His Season 12 and current All-Stars partner Kirstie Alley added, "I shall bite thine tongue, lest I get into a girl fight that I would surely lose without a hammer in my hand."
ABC, BBC Worldwide Productions, which produces Dancing, and Chmerkovskiy's rep all had no comment.