This’s actually normal and it happens to me too
When you get tense, it’s not just the shots execution gets worse, your decision making gets worse as well, U start overthinking, forcing things, or playing too safe at the wrong moments
And sometimes the pressure is not only because it’s a tournament, but also because you start feeling like you’re the reason you might lose, or you feel your partner is getting frustrated, so the pressure keeps building…
Honestly, this is where the partner matters a lot. When my partner makes mistakes, I always try to encourage him and take pressure off him, not add more. And when I am the one feeling tense, if my partner reacts that way with me, I usually settle down much faster and start playing my normal level again, even if we are clearly behind on the score
So for me, a big part of dealing with nerves is.. don’t stay stuck on the last mistake, let it go quickly, encourage yourself, and make sure you and your partner try to support each other in a positive way during matches