Tiyeni tiwonere kanema wa akatswiri, tikukhulupirira kuti ikuthandizani kuphunzira momwe mungasewere ndi makina a mpira wa tenisi.

Mu kanemayo muliMakina abwino kwambiri a mpira wa tenisi S4015, yonyamulika, yokhazikika komanso yogwira ntchito bwino.