By Jelani Scott Barnes, 20, exited in the fourth quarter after being inadvertently stepped on by Joel Embiid. Raptors forward Scottie Barnes exited Saturday’s Game 1 loss to the 76ers after sustaining a left ankle sprain in the fourth quarter. Barnes’ ankle was inadvertently stepped on by 76ers center Joel Embiid as the All-Star big man made a move to the basket with a little over nine minutes to play. The rookie writhed on the floor in pain for a few minutes before being helped to the locker room. The Sixers, who controlled much of the contest, beat the Raptors, 131–111, to take a 1-0 series …