In tennis, a Double Bagel is when a player wins a match 6-0, 6-0.
That means they won both sets without losing a single game. The term comes from how the score of zero looks like a bagel.
Double bagels are rare at the pro level, as they require total domination.
In 2007, Justin Henin double bageled Marion Bartoli at the WTA Tour Championships. It was the only double bagel in the tournament's history.
Steffi Graf also famously double bageled Natasha Zvereva in the 1988 French Open final.