Warriors shooting guard Klay Thompson (back stiffness) returned to practice Monday and is expected to play Tuesday night against Toronto. Thompson missed only one game — the Warriors' 107-99 overtime victory against Brooklyn on Saturday — but he's essentially had three days to rest. "We're not really concerned about Klay, at all," interim head coach Luke Walton said. After scoring 21.7 points per game on 43.9 percent three-point shooting and making his first All-Star Game last season, Thompson is averaging 15.2 points on 38.6 percent three-point shooting. Walton said the coaching staff hasn't decided whether Andrew Bogut or Festus Ezeli will start at center against the Raptors. Ezeli has started the past 10 games, including the four since Bogut returned from a concussion. Draymond Green missed practice because of flu-like symptoms, but Walton expects the power forward to play Tuesday. … Reserve guard Leandro Barbosa, who has missed the past two games while tending to a family matter in Brazil, is expected to be at Tuesday morning's shootaround and to be available to play that night.