Lamar Odom has officially pissed off Khloé Kardashian’s boyfriend, Tristan Thompson.

Sources tell Life & Style that the Cleveland Cavaliers player freaked out when the reality star’s ex admitted, “I want my wife back,” on an episode of The Doctors. “Tristan went ballistic,” an insider reveals. “He called up Lamar and told him he acted foolishly, and he warned him to stay away from Khloé or else.”

The problem is, Lamar “believes he still has a chance with Khloé.”

khloé kardashian lamar odom getty images

Khloé and Lamar in February 2016.

Although the NBA pro has only been dating the 32-year-old for four months, he’s aware of the pain that Lamar’s substance abuse and near-fatal overdose caused. “Deep down Tristan knows Khloé would never take back Lamar, but he is concerned that his girlfriend will fall for Lamar’s pity pleas and feel pressured to be there for him in case he goes off the rails again,” the insider adds.

After all, she did rush to the 37-year-old’s side when he was hospitalized in October 2015. But Khloé has since started a new life with Tristan, 25, moving into his Cleveland home part-time.

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“Tristan doesn’t want any drama in his life,” the source says. “Khloé is his woman, and there’s no way he’s going to allow anyone to get in the way of his relationship.”

The blonde beauty made her feelings about the situation clear in a Snapchat post over the weekend, saying, “Hello, baby,” while cuddling up to her beau.

But it doesn’t look like Lamar will be giving up any time soon. “Lam needs TT to know how madly in love he still is with Khloé and wants Tristan to understand that he and Khloé have unfinished business,” a source told Hollywood Life. “Lam doesn’t want to disrespect what they have, but he thinks Tristan is just like James Harden and French Montana — a place holder in her life for when he returns.”

For more on Lamar, pick up the latest issue of Life & Style, on newsstands now. And scroll through the gallery below for a look at Khloé and Tristan’s cutest photos together!