I like Vilas quite a bit(& own copies of his AO finals), but saying those AO wins are even in the same ballpark as any of Djokovic's slam wins is a stretch, to say the least. A lot of posters here like to point out that Borg, Mac, Connors etc didn't play the AO back then. But that doesn't even begin to explain just how poorly attended the AOs Vilas won were. 1979 AO - Vilas was the only player in the top 20 entered. There were only 8 other players in the top 50 entered. And only 13 other players in the top 100 entered. So it was a 64 player draw & 42 of the players entered weren't even in the top 100. I'm not sure what you could compare these events to today, certainly not masters series. maybe a 250? I would be more impressed if Vilas made a SF at Wimbledon or a final at Queens at some point in his career, you can't really draw any conclusions about how good a grasscourt player he was based on these results.