In the situation Jim describes, where fatigue plays in, it is important to call contact that had not previously been occurring, or contact that becomes more pronounced (a slight handcheck in the first half becomes a more aggressive hold in the second). The coach has no gripe then (not that they won't speak up) because it is the coach's responsibility to recognize fatigue and give their players a break before they take a couple of unnecessary fouls. The coach also needs to know the players that, either due to lack of fitness or extraordinary defensive exertion, tend to tire and need frequent breaks.
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