The LSU football team didn’t fly to Las Vegas this weekend to have a little fun and maybe lose a few dollars at the Bellagio.

At least according to Will Campbell, the Tigers are on their way to Sin City to fight.

“We know what we’re here for. We’re not here to go to Caesars Palace,” Campbell said. “And everyone in this building knows that.”

LSU opens its season on Sunday against USC at Allegiant Stadium in Las Vegas. The matchup marks the start of coach Brian Kelly’s third season as the Tigers look to end a four-game home losing streak.

This is only the third time LSU and USC have faced each other on the football field. The last meeting was in 1984, when the Tigers defeated the Trojans 23-3 at the Coliseum. But the first game between the two teams at Tiger Stadium in 1979 was won by USC, overcoming a 12-3 deficit in the fourth quarter to win 17-12.

Here are live score updates from LSU’s big season opener against the Trojans.

FINAL SCORE: USC 27, LSU 20

After trailing 17-13, the Trojans went on a 14-3 run in the fourth quarter to hand LSU its fifth consecutive loss in Week 1.

Fourth quarter

Nussmeier’s first throw of the drive is intercepted. USC takes the lead with four seconds left.

SCORE: Marks scores a touchdown on a run up the middle. After the extra point, USC leads 27-20 with eight seconds left to play.

The call for Gilbert is affirmed, which means he is ejected from the game.

Moss hits Hudson for a 20-yard pass for a first down. Jardin Gilbert is then cautioned for targeted tackling. The play is reviewed.

USC is getting close to field goal range with 22 seconds left. The Trojans have the ball at the 42-yard line.

LSU is unable to convert a third and 8 attempt and has to settle for a 31-yard field goal. Ramos equalizes the score at 20-20 with 1:47 left.

Nussmeier completes another pass to Thomas. This catch goes for 12 yards, putting LSU at the USC 16-yard line.

Nussmeier hits Anderson for a 41-yard completion. The Tigers are now inside the USC 30-yard line.

SCORE: Moss plays a 28-yard touchdown pass to Ja’Kobi Lane. The Trojans take the lead again at 20-17 with 5:44 minutes left in the game.

Emery is stopped on third and one, forcing a three-and-out. USC gets the ball back with 6:57 left in the game.

The Tigers lead 17:13 with 8:38 minutes to go.

LSU forces a turnover after Jones deflects Moss’ pass into the air. Weeks nearly intercepts the pass. The Tigers have the ball at their own 21-yard line after Major Burns is whistled for unsportsmanlike conduct.

On third and six, Whit Weeks makes a tackle that loses a USC run to the right. The Trojans try fourth and ninth at the LSU 36-yard line.

Correction: Womack is not injured and is back in the game.

Nussmeier’s throw to Josh Williams is perfect, but Williams is tackled just before the post, so LSU has to punt the ball. Todd punts the ball to USC’s 15-yard line.

Third quarter

Emery catches a pass and gains 16 yards on two consecutive plays to end the third quarter. LSU has the ball on its own 39-yard line.

A fumble and a penalty push USC back into their own end zone. Shortly before the start of the fourth quarter, the Trojans are forced to punt the ball away.

Injury update: Da’Shawn Womack is wearing civilian clothes and has an injury to his left knee.

Injury update: Moss injured his throwing hand on USC’s previous drive, but was in the game after the LSU touchdown to start the Trojans’ next drive.

SCORE: Nussmeier plays a 13-yard pass to Aaron Anderson for a touchdown. After the extra point, the Tigers take a 17-13 lead with 3:42 minutes left in the third quarter.

The Tigers are in the red zone after another productive 10-yard run by Emery.

John Emery runs 39 yards up the middle to the USC 29-yard line.

LSU’s second drive of the half begins at their own 22-yard line.

SCORE: Sai’vion Jones sacks Moss and forces USC to attempt a field goal. This time, Lantz hits the 35-yard field goal to give the Trojans a 13-10 lead.

USC gets a third pass and long after that PJ Woodland is called for pass interference. The Trojans are in the red zone.

The Trojans crossed the halfway line after Moss hit Kyle Ford for a 41-yard gain on third-and-10.

USC then forces a three and out. Peyton Todd comes in and shoots the ball to Branch, who is almost immediately tackled at the USC 23-yard line.

LSU forces USC to a three-and-out after a pack of Tigers breaks up a Trojans screen pass on third-and-2. Thomas returns the ensuing punt 13 yards to the LSU 28-yard line.

Second quarter

USC quickly reaches LSU’s 12-yard line with two seconds left in the half and gets within field goal range for kicker Michael Lantz. But Lantz misses the 29-yard kick, leaving the score tied at halftime.

SCORE: USC stops LSU on a third-and-10 attempt at the Trojans’ 28-yard line. Damian Ramos comes in and kicks a 45-yard field goal, which he converts to tie the score at 10-10 with 1:08 left in the first half.

The Tigers offense is back in action, standing at the Trojans’ 32-yard line at the 2-minute timeout. Nussmeier has completed two more throws to Lacy and a pass to Taylor during the drive.

LSU starts its next drive at the 25-yard line.

SCORE: Ashton Stamps intercepts a pass in the end zone on third and goal at LSU’s 5-yard line, forcing the Trojans to attempt a field goal. After the short field goal, USC takes the lead again, 10-7. There are 4:21 minutes left in the first half.

There is no target acquisition on the field.

USC is back at the 20-yard line after wide receiver Jay Fair was called for a blind side block penalty. The play is being reviewed for accuracy.

It’s first and goal for the Trojans immediately after quarterback Miller Moss hits wide receiver Duce Robinson for a 38-yard completion.

USC wide receiver Zachariah Branch returns kicker Aeron Burrell’s kickoff to the LSU 43-yard line. Burrell made the tackle and prevented the potential touchdown. His kick came from the 20-yard line instead of the 35 because Lacy was assessed an unsportsmanlike conduct penalty after his touchdown catch.

Injury update: Parker is dealing with a shoulder injury, according to ESPN’s broadcast. He has not returned to the game since his injury in the first quarter, but has returned from the locker room.

SCORE: Nussmeier scores a touchdown against Kyren Lacy in the back of the end zone. The extra point is good and ties the score 7-7 with 7:04 minutes left in the first half.

The Tigers have crossed the halfway line again. Nussmeier’s latest pass to CJ Daniels brings LSU to the 33-yard line.

LSU starts its third drive at its own 2-yard line.

SCORE: USC takes the lead for the first time thanks to a two-yard run by running back Woody Marks. The extra point is good, and with 11 minutes left in the first half, the score is 7-0 for the Trojans.

It is the first and only goal for USC after Sage Ryan is called for pass interference in the end zone.

The previous game remains valid even after further review.

USC is at LSU’s 41-yard line after converting a third-and-2 attempt with a two-yard run up the middle. Trojans wideout Kyron Hudson then makes a stunning 24-yard catch that puts USC in the red zone, but the catch is still under review.

Louisiana Tech transfer Blake Ochsendorf makes the first punt of the night for LSU. Kelly said this week that he and Peyton Todd would both start punting against the Trojans.

The Tigers get a fourth-and-2 attempt to the USC 36-yard line. Garrett Nussmeier completes his fourth pass of the drive to Kyren Lacy for the three-yard reception.

LSU returns the opening kickoff. The Tigers begin their first possession at the 23-yard line.

Pre-match updates

16:54: Chris Hilton did not dress for pregame warmups. The junior wide receiver was questionable all week due to an ankle injury. Kyle Parker is expected to start in his place.