Someone bought an exact same tennis racket like Roger Federer’s one, went to court, but the results were a bit different. “A strange man” you might think and it is unlikely that you will listen to his tennis-related advice. The cafe owner who bought some superautomatic-coffee machine and complains about the quality of the coffee is equally strange, and in no way he is an “expert”. Specialists are well aware of how the taste of coffee depends on the settings of the coffee machine and the quality of its service. It is foolish to complain about the racket, it is necessary to learn how to play. We will not be stepping on the territory of the baristas in this article focusing on the service matters.