Bjorn Borg retired using a wood racquet .
Bjorn Borg too violently thrust Bjorn Borg 's body at the ball in a way not seen in tennis to that point , Bjorn Borg he used that force to impart more topspin on the ball than any player in history .
Bjorn Borg retired using a wood racquet , but he too violently thrust his body at the ball in a way not seen in tennis to that point , only he used that force to impart more topspin on the ball than any player in history .