Guillermo Vilas was a dominant Retriever. 52% of his points were won by the errors of his rivals and this result was far above average. Besides being as solid as a rock he had one of the best passing-shot of his generation. In total 50% of his points won with the forehand & backhand were actually passing-shots.
Retriever / Very high
Guillermo Vilas was much more a Retriever than a Puncher. When the baseline rallies started he made on average fewer points with the forehand & the backhand than his rivals. His main game plan was much more to make his opponents crack first than to attack them.
Puncher / Medium-low
Playing with topspin on both side, Guillermo Vilas could not be regarded as a Tempo player at all. Tempo players play close to the baseline and take the ball on the rise and this was not his case.
Tempo / Low
When he played on clay, Guillermo Vilas wasn't an Offensive player at all but when he played on grass he often played the serve & volley. We can say that he really adapted his game to the surface and like this he won 4 slams (2 on clay & 2 on grass).
Offensive / Medium
Opting for a high first serve percentage, Guillermo Vilas could not be regarded as a Server at all. He made on average 20% fewer aces/service winners than his rivals and did not count on this shot to win a match.