I had a disagreement with a poster some time ago over that youtube clip of Borg and Lendl in 1981. I notice it has become a popular reference for some people here. The disagreement was over Lendl. The poster argued that Lendl at the time was very young and hadn't yet learned to correctly drive through the ball. He said that the older Lendl would have been able to pulverize Borg's groundies rather than staying back behind the baseline and exchanging in long, debilitating rallies. I argued that this wasn't true at all. Even though Lendl was privy to graphite, the technology in the 1980s still wasn't anywhere close to what we have now, not to mention the strings. As tall and strong as Lendl was, he still coudn't deviate beyond the reality of the place and time. The clay was slower, the racquets provided significantly less control than they would years later and that meant for very, very slow tennis. Lendl whether 21 or 25 wasn't really the catalyst for power tennis as some suggest he was. If anything, I believe he's pretty old school. Someone posted this clip recently of Wilander and peak-strength Lendl playing in Roland Garros in 1985. Watch how slow and long the rallies are. By all means, clay court tennis really hadn't changed all that much between 1981 and 1985. http://www.youtube.com/watch?v=AudpnN67vUQ&feature=channel_page&fmt=18 The biggest change actually appears to have occured in the late-80s as racquet technology continued to evolve.