I think borg and agassi changed the game forever "thetruth".
both had an enormous impact on the sport. I would say the game of the future is closer to the way borg played.
the tennis player of the future will have to be an unbelievable athlete first and foremost.
and borg was the finest athlete in the world in all of sports in his day. nobody had his athletic ability, his agility, his movement, and his speed.
and then he was the absolute master of crafting points. he played the percentages and that is why he almost always won.
we see some of borg in nadal. just like borg, nadal too has the highest winning percentage in the sport now.