King of Clay opens vs. Mischa Zverev.
The 22-year-old Ukrainian is the first from her country to reach the milestone.
Serena interrupts this match to ask: Mind if I play?
Former No. 1 aims to expand her brand.
Days after her 35th birthday, Li Na debuts new line.
Major error evokes tennis response.
“A career Grand Slam is not a goal at the moment,” says US Open champion.