He used the Kneissl White Star from 1985, so he did change from wood pretty early. But he still used wood in the AO final 1984 against Wilander. He lost.If the young Borg had the energy for this endless partying than its hard to believe he suffered from a burn out which is an indication of lower energy and lust. Lol. It is better explanation that Borg ended his career so early because he couldnt stand losing, which is also what Wilander said on tv about Borg. I do remember somebody who used a wooden racquet still when everybody else used modern racquets. It was even on grass of Wimbledon and he hitted a lot of aces with his Jack Kramer. His name Kevin Curren! So it wasnt only because his outdated gear Borgs comeback failed. By then topspin was normal so they were used to it and knew how to handle it.