Carlos Alcaraz with NBA star Jimmy Butler© AFP After Carlos Alcaraz dispatched Martin Cilic in the opening round of the Qatar Open on Monday he lingered on court to play a few balls with a spectator – NBA star Jimmy Butler. Alcaraz took his time to find his rhythm on a windy night but eventually overcame veteran Croatian 6-4, 6-4, then took on Butler. The 35-year-old guard, recently traded to the Golden State Warriors, opted not to stay by the Bay while it hosted Sunday’s National Basketball Association All-Star Game. Instead he flew to the Gulf and was in the crowd to see Alcaraz win. Butler then came on court. Both men donned microphones as they put on a short show for fans. Butler even attempted to return an Alcaraz lob with a between-the-legs shot – but missed. Against the 36-year-old Cilic, Alcaraz was stronger at the pivotal moments. The first set turned on an 18-minute seventh game which ended with Alcaraz gaining the service break he needed. In the second set, Alcaraz …