1981 Wimbledon Championships – Men's singles

John McEnroe defeated five-time defending champion Björn Borg in a rematch of the previous year's final, 4–6, 7–6^(7–1), 7–6^(7–4), 6–4 to win the gentlemen's singles tennis title at the 1981 Wimbledon Championships. It was his first Wimbledon singles title and third major singles title overall. Borg was attempting to equal William Renshaw's record of six consecutive Wimbledon titles and Roy Emerson's all-time record of 12 major singles titles. It was Borg's last Wimbledon appearance.

During this tournament, McEnroe famously shouted "You cannot be serious!" to the chair umpire in response to a serve being called "out". The disagreement took place on 22 June, during his first round match against Tom Gullikson.