Wearing a gray designer suit, Danilo Gallinari stopped in front of the Nuggets’ locker room at Staples Center and wrapped head of team security Bobby Simmons in a pseudo headlock. The playful greeting illustrated six years of relationships that cannot be broken by a summer sign-and-trade. Wednesday’s matchup between Denver and the Clippers also doubled as Gallinari’s first chance to reunite with his former team, following an offseason departure he described as amicable. “I tried (to stay),” Gallinari said. “Denver has always been my first option. I think you guys know now how the (contract negotiations and trade) went. But there were no hard feelings. It was not a bad breakup. Everything’s fine.” After attempts to work out a new contract with Gallinari dissipated, Denver traded its leading scorer from a year ago to the Clippers as part of a three-team deal that sent a 2019 second-round draft pick back to the Nuggets. It ended Gallinari’s productive tenure in Denver, as he averaged 16.2 points per game over six seasons while shooting 45.8 percent from the field and 41.9 percent from 3-point distance.