Players and spectators had to look away. Five minutes into his first game with Boston, the All-Star forward collided with LeBron James and collapsed under the net with a dislocated ankle and a fractured tibia. Hayward had to be stretchered off the court. A fan favorite with the Utah Jazz for seven years, he’d just signed a four-year, $128 million contract with the Celtics and was a vital part of their winning strategy. Now Boston may need a backup plan as Hayward goes into surgery today.