SHANGHAI — The first rule of preseason is to get through it healthy. The Nets aren’t close, with the starting backcourt of Kyrie Irving and Caris LeVert being forced out of Thursday’s 114-111 win over the Lakers in the first two minutes.

After having suffered a facial fracture in an offseason pickup game that cost him the start of training camp and the preseason-opening win, Irving’s Brooklyn debut lasted just 1:06 due to what’s being listed as a facial contusion. The Nets don’t think the injury is serious.

Irving — who signed a four-year, $141 million max contract this June — took an inadvertent shot to the face from Lakers point guard Rajon Rondo. Irving tossed his face mask down, walked to the bench and cut loose with an expletive, in clear discomfort. He was replaced by Spencer Dinwiddie.

Just 22 seconds later, the Nets lost LeVert. He got poked in the right eye, and followed Irving into the Mercedes-Benz Stadium locker room. Though his return initially was listed as questionable, LeVert also sat out the rest of the game.

No further update was given on LeVert.

With superstar Kevin Durant sidelined for most, if not all, of the season due to a ruptured Achilles tendon suffered in the NBA Finals playing for the Golden State Warriors, any kind of lengthy injury absence for Irving would be costly for the Nets, who already face the usual aftereffects of a China trip.