Tristan Thompson was reportedly spotted having an intense phone conversation while in Dallas, Texas over the holidays.
According to a report from The Sun, an eyewitness saw the NBA star at the Dallas/Fort Worth International Airport, who claimed that he looked "angry" while taking a phone call.
"He was on the phone for a while and looked so angry," the source told the outlet. "He wasn't yelling, like in a loud way where all of the people around him would hear, but from afar you can tell he was talking in an angry tone with whoever he was talking to."
"He was heated and letting them have it," the source added.
The sighting of Thompson in Dallas comes as his ex Khloé Kardashian was spending the holidays in Los Angeles, Calif., with the pair's 3-year-old daughter True.
The former couple have been rumored to be on rocky terms lately after news broke earlier this month that the basketball player allegedly fathered a child with personal trainer Maralee Nichols while he was still dating the reality star.
Nichols — who claims to have hooked up with Thompson on multiple occasions around the time of his birthday in March — gave birth to the new baby boy on Friday, December 3. She has also filed a child support suit against him.
The Sacramento Kings player has yet to directly address the reports of his alleged love child, but court documents revealed that he requested a paternity test to confirm that he is the baby's father. He also claimed in the legal papers that he will "not be seeking custody of visitation," even if the child is proven to be his.
As OK! previously reported, Nichols recently broke her silence on the matter, insisting that she was not aware at the time of her relations with Thompson that he was still dating the Keeping Up With the Kardashians alum.
"He told me he was single and coparenting," Nichols said in a statement last week. "I would have never gotten involved with Tristan if I thought he was in a relationship."
She also expressed her intentions of keeping her pregnancy and her baby's life out of the public eye — which is why she refrained from posting on social media throughout her entire pregnancy.
However, she recently shared the first photo of the newborn celebrating his first Christmas while Thompson maintains he will not be looking to be involved in the child's life.