HOUSTON - A judge granted the divorce between San Antonio Spurs star Tim Duncan and his wife in a district court in Texas, marking the end of their 12-year-old union, US media reported Wednesday.

San Antonio Spurs' Tim Duncan walks down the court near the end of their loss to the Miami Heat in Game 7 of their NBA Finals basketball playoff in Miami, Florida June 20, 2013. [Photo/Agencies]

Judge David A. Canales told the San Antonio Express-News that he held the hearing Tuesday noon at the offices of Tim Duncan's lawyer at the latter's request. The couple and their lawyers were present.

Canales said that the parties chose the secret hearing because they felt uncomfortable coming to court for fear of people taking pictures of them or asking for autographs.

Details of the divorce, such as the division of assets and which parent gets custody of their two children, were not immediately released.

The Duncans were college sweethearts at Wake Forest University, where Tim starred on the Deacons basketball team and Amy was a cheerleader. Tim graduated in 1997 and was the first overall pick in the NBA draft, made by the Spurs.

The couple married July 21, 2001, and have a daughter and a son, records show. Little explanation is given for the breakup.

"The marriage has become insupportable because of discord or conflict of personalities between petitioner and respondent that destroys the legitimate ends of the marriage relationship and prevents any reasonable expectation of reconciliation," both of their divorce petitions said.