The New York Knicks believed the San Antonio Spurs tampered with Kristaps Porzingis when he was still on their team, according to Stefan Bondy of The New York Daily News.

Porzingis played three seasons with the Knicks. He was traded to the Dallas Mavericks shortly before the 2019 trade deadline after he reportedly requested a trade.

The fallout was multi-layered. Morris and his agent, Rich Paul, parted ways. The Spurs were reportedly pissed at the Knicks for poaching their signing. The Knicks, according to sources, felt justified because they believed the Spurs tampered with Kristaps Porzingis while he was still under contract.

Porzingis has career averages of 17.8 points, 7.1 rebounds and 1.3 assists in 186 games with the Knicks while shooting 43.7 percent from the field, 36.1 percent from beyond the arc and 80.4 percent from the free-throw line.

The Mavs gave KP a five-year, $158.3 million deal this summer.

New York signed Marcus Morris this offseason after Morris backed out of his deal with the Spurs. Morris agreed to a two-year, $20 million deal with the Spurs and then signed a one-year, $15 million deal with the Knicks.

Porzingis returns to New York to face the Knicks on Nov. 14. KP missed all of last season recovering from his ACL tear.