Back injury sidelines Australian Open champion.
Aryna Sabalenka and Dayana Yastremska keep climbing the WTA rankings, and they weren't the only ones making moves this week.
Fila will remain official apparel and footwear supplier for the BNP Paribas Open.
World No. 2 will talk tennis future in live streamed chat.
Former CEO of Sport England named to newly-created post.
The Chinese No.1 is playing at a career high No.18, but no longer has a coach.
The Romanian and the Belgian will kick off their collaboration on February 11.
