Djokovic last year had one of the most impressive winning streaks in the Open Era. Vilas’ winning streak was longer, but it was achieved against lesser opponents as this graph from the ATP shows. In McEnroe’s streak, for example, he posted wins over his two top rivals, Connors and Lendl. That’s why his streak was so impressive – why he was regarded as utterly dominant in ’84. Federer as well, in his streak, posted wins over his top rivals, including one at the Masters Cup over Nadal. Borg’s streak included a number of wins over Connors and McEnroe, his two nearest competitors at that time. Djokovic posted wins over Federer and Nadal during his streak, including two massively impressive wins over Nadal on clay. Vilas in his streak did not meet Borg. He met Connors once and defeated him, at the USO, and that’s his unquestioned greatest victory. But his numbers against the top ten and top five are not impressive. That’s one big reason that Vilas did not win universal regard as #1 in 1977: it was the weakness of the draws in the tournaments he was choosing to play. He could have met Borg in October, in Madrid and Barcelona (after Nastase ended his streak). But he did not play those events, citing injury – and of course that’s a minus in his column, just like Borg’s injury at the USO is a minus in Borg’s column. You have to stay healthy to win events. And Madrid and Barcelona were big events: 64-man draws with best-of-five matches in the last two rounds (Borg won them both). There are still other reasons that most authorities chose Borg over Vilas in ’77 (for example, Vilas’ numerous losses during the year), but the chart above illustrates one of the major issues.