According to
www.Las-Ventas.com (the official website to Madrid's bullring), there
is a bullfight on
June 24th (<-Click), but couldn't find anything for July 1st. Their website doesn't seem to have schedule information for July yet -- they're still quite consumed with the San Isidro festival. As Antonio mentioned, you can find links to other bullfight/even-ticket sites on my
links page.
Good luck! Saludos, MadridMan