In fact , she out - split Ledecky ( WHAT ? ! ) on the back half as a whole .
Was faster on each of the last four 50 's save for a tie at 30.30 on the last 50 .
In fact , she out - split Ledecky ( WHAT ? ! ) on the back half as a whole , and was faster on each of the last four 50 's save for a tie at 30.30 on the last 50 .