The organizers put Maria's match before Wozniacki's
Wozniacki will lose on purpose so she'll eliminate Maria and won't face Serena in the semifinal. Terrible mistake by them. They made a similar mistake with Serena. Now Halep can decide who goes to the semifinal between Serena and Ana. However I can see Halep displaying fair play and not losing on purpose or to keep some energy, on the other hand Wozniacki has reasons to give away the match.