Viral illness knocks former No. 1 out.
Russian has new role as brand ambassador.
Former No. 1 candidly talks challenges of life as a working mom.
World No. 9 receives Delray Beach wild card.
When Bianca Andreescu took a tumble, ball boy had her back.
Former world No. 181 bears "no fault" for steroid detected in her system last June.
The 37-year-old Swiss says he knows he "can still beat" the world's top two.
