Investigations of Pollard et al. showed, the better player lifts his probability of winning a set in certain situations. These situations are: 1. The player is behind in the set score, needs to lift his game, and lifts his probability of winning the next set by (on average) 0.035; 2. The player he has just won a set, is `on-a-run`, and lifts his probability of winning the next set by (on average) 0.035; 3. The player has just lost two sets in a row, desperately needs to lift his game, and lifts his probability of winning each remaining set by (on average) 0.110, a substantial amount. In this article, the above results are used to determine what proportion of a match win can be attributed to a player`s ability (by assuming no memory of the scoreboard) and what proportion of a match win can be attributed to the psychological affects when a scoreboard is present. Further analysis is carried out to determine how the percentages of points won on serve vary as the match progresses from set to set. These results could be used in the training and coaching of players.
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