Sun Yu has to play smart and not rely too much on brute force to win as WYH sometimes (or often ?) does.
Even when Intanon wins the point, it seems like Sun Yu wins the rally. Intanon has to run all over the place and bend her back so far. Sun doesn't even look like she's moving.
But Sun Yu isn't reading IR's game well yet, even Han Li has managed to do so the last she played and beat IR.
Tan & Tan should have won the rubber but unfortunately TWK made some errors and you don't do that againgst the world number two ranked pair.
Sun Yu is not paying her game right, too passive, Intanon is not allowing her to and is the one dictating the rally.