do you actually have a game plan against this guy? you've played him several times - do you know his weaknesses, his tendencies?
your second serve should be bomb proof. many people don't practice their second serves enough even though most play with their second serves. play practice matches with just one serve - that sorts out your second serve pretty quickly.
to help with shot selection, I like playing set pieces (carried from badminton training). you get muscle memory, more reaction/instinct and less thinking involved which usually means less choking.
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