I was watching a short clip of a match point that lasted a few minutes by borg and lendl in a french open final. not sure what year that was but lendl looked pretty young. anyways... people are always talkiing about how fast borg is and comparing nadal's speed to his. if you watch the clip, both players are NOT running to the balls! they literally walk and at most cases they jog. so based on this, how can anyone compare atheletes today vs backthen. If i walk or jog to every ball, i'm sure i can rally all day long. No one hits winners and every shot is slllowww as heck. could it be the surface? or the balls? im still amazed now that i watch it.