The Celtics lost one of their key reserves in free agency as Luke Kornet is headed to the Spurs. Kornet agreed to a four-year, $41 million deal with San Antonio, a source confirmed to MassLive, as the big man got an expected big contract on the open market. ESPN’s Shams Charania was the first to report the deal.

Boston Celtics player Luke Kornet will be headed to the San Antonio Spurs after agreeing to a four-year $41 million contract, reports say.

The Celtics hoped to be able to hold onto frontcourt free agents Al Horford and Luke Kornet, but that does not appear to be happening. According to an ESPN report, Kornet will be signing a four-year, $41 million deal with the Spurs.