Rafael Nadal trained with Stefan Kozlov ahead of his first-round clash at the ATP 500 event in Acapulco. The 21-time Major champion is playing his first tournament since that incredible victory over Daniil Medvedev in the Australian Open final, seeking the fourth Acapulco title.Nadal and Kozlov could not finish their practice set, as the American got a call from the organizers to prepare for the main draw action, entering the tournament as a lucky loser. At 24, Stefan is trying to raise his game to a higher level and finally crack the top-100 five years after his career-best ranking!Kozlov scored a victory at the Australian Open and reached the Delray Beach quarter-final last week before receiving the good news in Acapulco while training with the 21 …