NBA Star Tim Duncan, who is in the middle of an impending divorce, had concerns about his marriage as far back as a year ago and hired a private investigator to follow his wife Amy of twelve years, according to The San Antonio Express News.

Veteran-reporter Buck Harvey of Express News reported Saturday that Duncan first suspected something was wrong last fall and hired a private detective to track Amy.

The divorce papers were filed by her back in March, but she moved out of the family home approximately 20 days ago.

Spurs spokesman Tom James confirmed Saturday that Duncan and his wife are divorcing. 

The ten-time All-NBA forward star filed legal documents in his divorce case and asked the judge to halt the dissolution of his marriage until the San Antonio Spurs either clinch the NBA championship or get knocked out of the running.

Duncan made the case that his employment "is currently making extraordinary demands on him and hopefully will continue to make those demands for the next 30 or so days," in legal documents filed in Bexar County, Texas, TMZ reported.  

Duncan's wife, Amy, filed for divorce in March and said she wanted to end their 12-year marriage which she said became "insupportable because of discord and conflict."

In the documents, Duncan revealed he has a prenup and that he wants it enforced. This is important because Duncan got married 4 years after he was selected in the first round of the NBA draft.  In 2012, he signed a 3-year, $36 million deal, but that is just the last contract. Duncan's net worth is a lot more than that, according to TMZ.

Duncan also says he expects he and Amy will reach an agreement on financial support for their two children.

The legal documents are only initialed, not signed, by the two parties involved, but clues indicate the divorce papers belong to Duncan and his wife. The documents obtained by The San Antonio Express News show that the couple married on or near July 21, 2001, which is the date the Duncans wed. Two children with initials and birth dates that line up with the couple's two children, Sydney and Draven, are also mentioned.

Meanwhile, Duncan and the Spurs currently lead their Western Conference finals series against the Memphis Grizzlies 2-0. Game 3 of the best-of-seven series is scheduled for Saturday. The NBA Finals are scheduled to begin June 6 and conclude on June 20.

Tags: Tim Duncan San Antonio Spurs