Serena will face two major challenges in comeback says Chrissie Evert.
Novak Djkovic has had a medical "intervention" on his right elbow.
Australian Open boys' champion replaces Melbourne semifinalist in field.
The Williams' family dominance of SW19 could continue for years.
The former World No.1 will play for the first time since Wimbledon.
Former No. 1 to play Dubai for first time in 12 years.
World No. 1 knows why she's playing her best now.
