I think it was simply a good goal by WHU, Yaya attempted to challenge his man who beat him with pace and Athletism, Delph was with Valencia at the top of the box, but once the ball has moved past the 18, Delph naturally has to get level with the ball or goalside of it, which he did and this was able to block the original cross. Unfortunately, it bounxr d to Valencia who scored.
It's just good football by WHU. I thought Otamendi might have been better cover, if he didn't try to anticipate an Interception. But even that is nitpicking.
Great play by WH. It is their 2nd that's a real problem.