What is tennis triple bagel?

Tennis triple bagel refers to a situation in a tennis match when a player wins all three sets without losing a game, that is, a score of 6-0, 6-0, 6-0. It is a rare and impressive feat in professional tennis, signifying complete dominance over the opponent. Only a handful of players have achieved a triple bagel at the highest level, including Serena Williams, Novak Djokovic, and Roger Federer. In some cases, a triple bagel can also occur in a doubles match when one team fails to win a game in all three sets.