Virtually the entire Top ten is playing at or near their peak performances at theis tournament. Monica is the exception, but when you win it four times in a row,(she skipped two), if you don't win, its magnified.
Martina hasn't won the last two years, but she's been in the final.
Which means whoever's the best player will probably winthis tournanent. The injured have had time to rest. Everyone has had a chance to prepare. Everyone is playing some kind of tuneup. This is as level as the playing field gets.