Crossword puzzle clue "most important u s open match"

Most important U.S. Open match

___ event (most important boxing match of the day)

One with an important role in the production of a fantasy film or period drama (not so important for a porno, though)

All-important match

Important match

Out with a Match.com match, say

"The most-played, most-imitated, most influential puzzler of all time," per the video game website IGN

Open a tennis match