Enes Kanter's tweets notwithstanding, the Boston Celtics still may look to upgrade ahead of the NBA trade deadline. The Celtics maintain interest in trading for Washington Wizards big man Davis Bertans, Sports Illustrated's Chris Mannix reported Friday morning. Boston isn't alone, however: Mannix reports the Atlanta Hawks, Los Angeles Lakers and Denver Nuggets also have expressed interest in Bertans and names the Philadelphia 76ers as another team that could covet Bertans' shooting ability.