Normally, tiebreakers are used to resolve a tightly contested game quickly. But that really wasn't the case when McEnroe and Borg took the field to contest the 1980 Wimbledon Finals.
Borg was chasing history, and McEnroe was standing in his way. McEnroe had earlier won the US Open against Borg the previous year, so he had every reason to go for the kill.
McEnroe took the first set and Borg took the next two. Then came the legendary tiebreaker, which lives in the memory of millions, even today.
Borg had five match points (in addition to two held during the fourth set), and McEnroe had seven set points. Eventually, McEnroe prevailed to take the match to a deciding fifth.
In the fifth set, Borg raised the level of his game, winning 28 of 31 points on serve in the set. McEnroe was tiring, and, on several occasions down 0-40, but got out of trouble every time.
But when serving at 6-7, McEnroe went down 15-40 and Borg finally won the match with a cross-court passing shot.
The level of drama, the quality of shot-making, and the class of the players make it one of the most significant games in tennis history.