There are two ways to delete an individual event (use whatever is most convenient)
Read this note first!

1)  Go to the Calendar in Monthly view, click on the event, choose "Delete Event"



2)  Go to the Admin Menu (Calendar | Admin Menu) and choose Option # 4 - Events: List / Edit Events
Delete the event in question:



In both cases you will receive a cautionary warning (to prevent inadvertent deletion)


Read This First
You should not delete events that have enrollments or payments.  This can cause "orphaned" records in both the player participation history and the TennisCollect payment history.

Related Article:
Delete Recurring Events (blocks of events that were made together)