Tennis great Rafael Nadal won’t compete at Laver Cup in Berlin next week, organizers announced on Thursday, with the Spanish superstar saying he was “really disappointed” to withdraw from the team event. Nadal had been scheduled to play alongside German world number two Alexander Zverev and Spanish world number three Carlos Alacraz as part of Team Europe against Team World at the event held at Berlin’s Uber Arena from September 20 to 22. “This is a team competition and to really support Team Europe, I need to do what’s best for them and at this moment there are other players who can help the t…