  In this paper we analyse tiebreak results from some tennis players in order
to investigate whether we are able to identify some strategy in this crucial
moment of the game. We compared the observed results with a binomial
distribution considering that the probabilities of winning or losing a point
are equal. Using a $\chi^2$ test we found that, excepting some players, the
greatest part of the results agrees with our hypothesis that there is no hidden
strategy and the points in tiebreaks are merely aleatory.
