  Focusing on motion of two interacting players in football games, two velocity
vectors for the pair of one player and the nearest opponent player exhibit
strong alignment. Especially, we find that there exists a characteristic
interpersonal distance $ r\simeq 500 $ cm below which the circular variance for
their alignment decreases rapidly. By introducing the order parameter $ \phi(t)
$ in order to measure degree of alignment of players' velocity vectors, we also
find that the angle distribution between the nearest players' velocity vectors
becomes wrapped Cauchy ($ \phi \lesssim 0.7 $) and the mixture of von Mises and
wrapped Cauchy distributions ($ \phi \gtrsim 0.7 $), respectively. To
understand these findings, we construct a simple model for the motion of the
two interacting players with the following rules: chasing between the players
and the reset of the chasing. We numerically show that our model successfully
reproduce the results obtained from the actual data. Moreover, from the
numerical study, we find that there is another characteristic distance $
r\simeq 1000 $ cm below which player's chasing starts.
