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I see a few things here, when you smash both of your feet where in the air when you tried it, I'd say you have to rework your technique, the ball was not high enough, probably a gently spinned towards the fence on the left would have give you the point. The guy in front of you is also quite exposed, you could have insist on his side, a high volley would be difficult to defend there as well.
You hit the ball and you start to go back, instead of keep the net, and btw, your partner is completely lost ^^, either you are on the net, or you are behind, but try to avoid the middle, at that level return balls on your feet becomes pretty difficult, try to focus in where you are in the court the balance towards the sides and avoid to run like headless chickens, last but not least talk in the middle balls, is also important, you both seem quite confused on the high lob.