Who are some of the greatest underdog stories in tennis history?

Tennis has had its fair share of underdog stories that have captured the hearts of fans around the world. From the rise of unknown players to the stunning upsets of established stars, the sport has delivered some of the most inspiring moments in sports history.

Bjorn Borg vs John McEnroe, 1980 Wimbledon

In 1980, Bjorn Borg was gunning for his fifth straight Wimbledon title. Standing in his way was the brash and talented American, John McEnroe. The final was an epic battle, with Borg ultimately prevailing in a five-set thriller that is still talked about today.

Andre Agassi, 1999 French Open

Andre Agassi was a former champion who had been written off by many as past his prime when he arrived at the 1999 French Open. But the American proved his doubters wrong, fighting through a tough draw to reach the final, where he faced Ukraine's Andriy Medvedev. In a dramatic five-set match, Agassi emerged victorious, becoming the oldest player in the Open Era to win a Grand Slam title.

Billie Jean King vs Bobby Riggs, 1973 Battle of the Sexes

Billie Jean King was at the forefront of the fight for women's equality in tennis, and her 1973 showdown with Bobby Riggs was a defining moment in that struggle. The match was hyped as a battle of the sexes, with the 55-year-old Riggs taking on the 29-year-old King. In a straight-sets victory, King put to rest any doubts about the ability of women's tennis players to compete at the highest level.