We have had seemingly an infinite number of GOAT threads throughout the years but I decided to have another thread for Peak Level with a minor difference. I would like to define PEAK LEVEL as the highest level of play over a five year consecutive period. Reason is that peak level can be define in an infinite amount of ways. It was be defined as one match, one year, one month etc. I want to see who is the best of all time over five years. The reason I picked five years is that the human body obviously ages and over let's say ten years their is considerably decline in physical talent. However a super player can maintain his great level of over five years. We cannot necessarily define it by statistics alone because it is often dependent on the level of the competition. A perfect example of this is Rod Laver from the mid 1960's to the Open Era in 1968 and 1969. Laver was 25 for most of 1964 and perhaps the top player in the world. He was at perhaps his physical peak and yet his winning percentage while he was on the Old Pro Tour was lower than when he started Open Tennis in 1968 and for a few years afterwards. Laver was to turn 31 in 1969 but his winning percentage was higher than any of his Old Pro Tour years from 1963 to 1967. Why? Because Open Tennis had lower competition than the Old Pro Tour. Laver had a number of easier matches that he was fairly certain to win in his sleep. Some names are Tilden, Vines, Perry, Budge, Kramer, Gonzalez, Borg and Laver. I'm sure Dan will mention Hoad and BobbyOne will mention Rosewall. And I am sure many will mention Sampras, Connors, McEnroe Nadal, Djokovic and Federer. Now five years to me insures super greatness but feel free to discuss one year GOATs also. Please discuss.