OAKLAND, Calif. — The first hint Kevin Durant’s Achilles tendon rupture will lead him to stay in Golden State has arrived.

When Klay Thompson was back in the locker room about to receive an MRI exam at Oracle Arena late Thursday, with what was confirmed to be an ACL tear, the Warriors superstar shooting guard received a Facetime call from Kevin Durant, according to ESPN.

Durant was still in New York’s Hospital for Special Surgery following his surgery. Mychal Thompson, Klay’s father and a Lakers broadcaster, overheard some of the conversation.

“I heard them talking,” Mychal told ESPN regarding the conversation. “But I don’t think they’d want me to divulge it.”

“They were encouraging each other to come back strong,” he added. “They got unfinished business.”

Is that “unfinished business” meant for Golden State in 2020-21? Both players could miss next season.

The call came shortly after the Warriors’ season ended with a 114-110 loss to the Raptors in Game 6 of the NBA Finals.

The Knicks still plan to chase Durant despite him being out for 2019-’20 season, but the Warriors superstar could feel it is best to rehab in a more stress-free environment and not make the drastic change to the Knicks — even if his chosen second-opinion doctor is here.

Knicks brass met with Murray State point guard Ja Morant in New York on Friday.

He is still rehabbing from minor knee surgery last month and can’t work out. The Post has reported the Knicks have Morant higher on their board than RJ Barrett, but the belief is the Grizzlies will take Morant at No. 2.