With James in attendance , the defending NBA Summer League champions cruised back into the semifinals, beating the Detroit Pistons 101-78 on Sunday.
Second-round pick Svi Mykhailiuk scored 19 points and Josh Hart added 18 for the Lakers, who shot out to a 33-14 lead after one quarter inside UNLV's Thomas & Mack Center.
James wore gold Lakers shorts in watching the Lakers improve to 5-0. He left as his former team, the Cleveland Cavaliers, were preparing for their quarterfinal game against Toronto.
The Cavaliers won that game and will meet the Lakers in the semifinals on Monday.
LAKERS 101, PISTONS 78
Jeff Ayres had 10 points and 10 rebounds for the Lakers.
Former lottery pick Henry Ellenson finished a solid stint in Las Vegas with 22 points for the Pistons (3-3). Second-round pick Bruce Brown added 11 but was a woeful 3 for 17 from the field, missing all six 3-pointers.
CAVALIERS 82, RAPTORS 68
John Holland scored 23 points and No. 8 overall pick Collin Sexton had 18 points and six assists for the Cavaliers (5-1).
The 12th-seeded Cavaliers broke open the game by outscoring the Raptors 21-4 in the third quarter, when Toronto went 2 for 20 from the field and missed all 11 3-pointers.
Chris Boucher scored 18 points for the 29th-seeded Raptors (2-4), who rested OG Anunoby. Malachi Richardson and Alfonzo McKinnie each added 14 points but combined to shoot 10 for 29.
TRAIL BLAZERS 95, CELTICS 80
John Jenkins had 25 points for the No. 2 seed Trail Blazers (5-0) and Archie Goodwin became the all-time Las Vegas Summer League scorer in the fourth quarter, passing Coby Karl (337).
Goodwin had 13 points and finished the game with his Las Vegas career mark at 343.
Wade Baldwin IV had 14 points and 10 assists, and Zach Collins scored 11.
Trey Davis had 19 points, and Guerschon Yabusele and Hassan Martin added 16 apiece for the Celtics (4-2).
Portland will face the 27th-seeded Grizzlies in the semifinals.
GRIZZLIES 82, 76ERS 73
Jaren Jackson Jr., the No. 4 overall pick, had 14 points, eight rebounds and four blocks to help the Grizzlies (3-3) top the 30th-seeded 76ers.
Brandon Goodwin led the way for Memphis with 21 points, Kobi Simmons scored 15 and second-round pick Jevon Carter added 11.
Furkan Korkmaz had 18 points, Demetrius Jackson scored 11 and Askia Booker 10 for Philadelphia (2-4).