CHICAGO -- Celtics guard Isaiah Thomas said his mind is not fully focused on basketball as he grieves the loss of his sister, and he's feeding off the support of his teammates during Boston's first-round series against the Bulls. "Mentally and emotionally, I'm not here, so I just feed off what the guys give me," Thomas said while addressing reporters for the first time since his younger sister, Chyna, died in a single-vehicle accident on April 15, a day before the series began. Thomas scored 33 points Sunday and helped Boston post a 104-95 triumph over the Bulls in Game 4. The series is tied 2-2. Thomas was joined by teammate Gerald Green and Thomas' two sons, James and Jaiden, at the podium after Sunday's win but requested that he be asked no questions about the loss of his sister. He did occasionally reference the emotional toll he's endured over the past eight days. "[My teammates] give me a lot of confidence. I can't do it without...