Kim was forced to retire at 63 13 to Mono due to the shoulder injury that she's been complaining about all week, which she says she started feeling as early as the Australian Open.
The retirement means that Caro will retain the top ranking and, instead of playing Kim, Ana will play Mono. Kim says she's still planning to play Miami, but you have to think the rest of the field smells blood in the water. If I'm Kim I'm more concerned with getting healthy in preparation for a title run at Roland Garros. No need to run down the body and play injured.