Let's see...Borg dominated the most competative era in the history of mens' tennis, remians the only male player ever to win 5 Wimbleon championships in a row, was the last player in more than 26 years to sail through a grand slam tournament without losing a set, holds a record at Wimbledon that is second only to Pete Sampras (only because Borg retired early), and holds a record at the French Open that stands to this day. Strange definition of "overrated">

Despite early retirement, Borg dominated the golden era of pro tennis. Twenty-six years after his retirement, his overall record at Wimbledon is second only to Pete Sampras. He remains the only male in history to win it five times in a row. Sampras could never win the French and, so far, Federer has been unable to win there. Borg won it six times- a record that stands to this day. Strange definition of "overrated".