Steve Kerr warned the United States must not "get lulled to sleep" by the fact they have already beaten Serbia twice recently.
The USA cruised past Brazil to reach the semi-finals of the Olympics, and Nikola Jokic's Serbia are next up.
Serbia have already faced the USA in the group stage, with the four-time reigning Olympic champions winning 110-84.
The USA also beat Serbia by 26 points in a warm-up match prior to the Games, but Kerr is taking nothing for granted ahead of Thursday's clash.
He said: "We can't get lulled to sleep because we beat them twice.
"We have to be prepared for their best effort. We've got to think about what they are going to do differently.
"Jokic, I guess he could play 40 minutes. What else do they have up their sleeve?"
It was a sentiment echoed by LeBron James.
"Every game is its own test. No matter what happened in the first two, it's about what goes down Thursday night," he said.
"So we need to lock in our film session, lock in during the day on Thursday, and then come out and be ready to go."
Jokic inspired Serbia to an Olympic-record comeback against Australia in the quarters.
How Serbia plan to manage Jokic's minutes is an intriguing question, but Joel Embiid is setting himself up to face the reigning NBA MVP for over 40 minutes.
"I guess we'll be ready for that," said Embiid.
"If that's what they think they have to do to try to beat us, then they won't hesitate to do that."
Clark sets WNBA assists record in Fever's loss
Caitlin Clark set the WNBA single-season record for assists with 320 in the Indiana Fever's 78-74 loss to the Las Vegas Aces on Friday night.
Clark scored all 18 of her points in the second half and finished with nine assists and eight rebounds. The rookie broke the mark of 316 set last season by Alyssa Thomas of the Connecticut Sun.
Clark was scoreless on 0 for 5 shooting in the first half and picked up her third foul when she was called for a charge late in the second quarter as the Aces took a 43-35 lead into the break. She scored 14 points in the third quarter to help the Fever trim a 13-point deficit to 60-57 heading into the fourth quarter.
Clark has continued to make history throughout her first year in the WNBA, surpassing the single-season three-point record among rookies on Aug. 28. She also dished out 19 assists in a loss to the Dallas Wings in July, setting a single-game record.
Tom Brady congratulates A'ja Wilson for breaking WNBA record
Tom Brady has taken to social media to congratulate A'ja Wilson for breaking the WNBA record for most points scored in a single season on Wednesday.
The Las Vegas Aces star scored her 941st point in the competition this term late in the first half of Wednesday's game against the Indiana Fever, having entered the matchup 11 points shy of the record.
She beat Jewell Lloyd's 2023 mark of 939 points, with her big moment coming when she sank a jumper from the free throw line with 26.4 seconds left in the second quarter.
Wilson ended the game with 27 points, 12 rebounds and two assists. She is averaging 27.3 points, 11.9 rebounds and 2.3 assists this season.
Seven-time Super Bowl champion Brady bought a minority stake in the Aces in March, and he took to X to hail Wilson in the aftermath of her achievement.
"There are so many incredible players in the WNBA right now," Brady wrote. "But there's only one A'ja Wilson!"
Wilson responded to the NFL legend, simply telling him: "Appreciate you!"
Wilson still has four more regular-season games in which to improve on her historic haul, with another trip to Indiana the team's next assignment on Friday.
Aces star Wilson breaks WNBA single-season scoring record
A'ja Wilson now stands alone as the WNBA's leader for points scored in a single season.
The Las Vegas Aces star scored her 941st point late in the first half of Wednesday's game against the Indiana Fever to establish a new WNBA single-season scoring record.
Wilson arrived in Indiana 11 points shy of the record, and broke the mark of 939 points set by Jewell Lloyd in 2023 with a jumper from the free throw line with 26.4 seconds left in the second quarter.
The two-time league MVP came into the game averaging 27.3 points and 11.9 rebounds and went into half-time with 12 points and eight boards.
Wilson has plenty of opportunities to add to her scoring mark, as Las Vegas still has four regular-season games scheduled.
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