Racing nerves can easily throw off focus, but a simple breathing trick helps:...

https://www.cast-bookmarks.win/feeling-the-nerves-before-a-race-is-normal-but-managing-them-can-boost-your

Racing nerves can easily throw off focus, but a simple breathing trick helps: inhale for 4 counts, then exhale slowly for 6 to 8 counts to calm the mind