That's the problem when you take your shot too late, the opponent has plenty of time and options to play the return.
Yes, unexpectedly, WSX just "stole" the game from SN's grip, no wonder Saina used up both her challenge cards, must be quite bitter for her to lose the first game.
One of the comments on youtube comments section for the ongoing match. Must say, I largely concur "If WSX owned somewhat of a workable i.e. with power, less unpredictable smash, we would have a beast "
When two players are too close in score, the strategy is to attach suddenly at the end of the game. Not too early.