<P> Borg lost to McEnroe again in four sets in the final of the 1979 WCT Finals but was now overtaking Connors for the top ranking . Borg established himself firmly in the top spot with his fourth French Open singles title and fourth straight Wimbledon singles title, defeating Connors in a straight - set semifinal at the latter tournament . At the 1979 French Open, Borg defeated big - serving Victor Pecci in a four - set final, and in the 1979 Wimbledon final Borg came from behind to overcome an even bigger server, Roscoe Tanner . Borg was upset by Tanner at the US Open, in a four - set quarterfinal played under the lights . At the season - ending Masters tournament in January 1980, Borg survived a close semifinal against McEnroe . He then beat Gerulaitis in straight sets, winning his first Masters and first title in New York . </P> <P> In June 1980 he overcame Gerulaitis, again in straight sets, for his fifth French Open title . Again, he did not drop a set . </P> <P> Borg won his fifth consecutive Wimbledon singles title, the 1980 Wimbledon Men's Singles final, by defeating McEnroe in a five - set match, often cited as the best Wimbledon final ever played--the only comparable match being the 2008 Federer--Nadal final . Having lost the opening set to an all - out McEnroe assault, Borg took the next two and had two championship points at 5--4 in the fourth . However, McEnroe averted disaster and went on to level the match in Wimbledon's most memorable 34 - point tiebreaker, which he won 18--16 . In the fourth - set tiebreak, McEnroe saved five match points, and Borg six set points, before McEnroe won the set . Björn served first to begin the 5th set and fell behind 15--40 . Borg then won 19 straight points on serve in the deciding set and prevailed after 3 hours, 53 minutes . Borg himself commented years later that this was the first time that he was afraid that he would lose, as well as feeling that it was the beginning of the end of his dominance . </P> <P> In September, 1980 Borg reached the final of the U.S. Open for the third time, losing to John McEnroe in five sets in a match that cemented what had become the greatest contemporary rivalry, albeit it short - lived, in men's tennis . </P>

How many wimbledons did borg win in a row