Rafael Nadal tested positive for the coronavirus after playing in an exhibition tournament in Abu Dhabi, the Spaniard said Monday. Nadal wrote on Twitter that the positive result came from a PCR test he took after arriving in Spain. Nadal said he is enduring “unpleasant moments” but hopes to improve “little by little.” He is in isolation at home and everyone who has been in contact with him was informed of his positive result. Hola a todos. Quería anunciaros que en mi regreso a casa tras disputar el torneo de Abu Dhabi, he dado positivo por COVID en la prueba PCR que se me ha realizado al lleg…