LOUISVILLE, Ky. — Bobby Petrino watched his offense come together, and also enjoyed a solid performance for his defense. The opening of the Petrino sequel at Louisville doubled as one successful ACC debut for the Cardinals.

Dominique Brown had a 15-yard touchdown run in the third quarter and Gerald Christian scored on a 10-yard TD catch late in the fourth, leading Louisville to a 31-13 victory over Miami on Monday night.

Despite the 18-point margin, Louisville showed little of the offensive efficiency expected to be a staple of Petrino’s second coaching stint at the school. The Cardinals outgained the Hurricanes 336-244 in a ragged offensive game for both teams.

But Louisville’s new 3-4 defense had three takeaways in the program’s first game in the Atlantic Coast Conference, including one that followed a costly fumble by Cardinals quarterback Will Gardner inside his 15.

The defense was especially good on third down, allowing the Hurricanes one conversion in 13 attempts.

“We got faith in each other,” junior free safety James Sample said. “Coaches put us through the situation where we were backed up, where we have to act like our offense fumbled early in the drive. We were used to it, we were ready for it.”

After Louisville held Miami to a field goal following Gardner’s second fumble in the third quarter, Brown’s TD provided a 21-13 cushion. Christian’s scoring pass from Gardner with 1:43 remaining sealed the win.

“I thought it would be a real battle and we would have to work extremely hard,” said Petrino, who returned in January to the program he led to a 41-9 record from 2003-06. “Obviously, we made some mistakes on offense and on special teams. I thought the defense really did a great job all night long, especially on third down.

“We found a way to win the game.”

Corvin Lamb’s 97-yard kickoff return right before halftime provided the go-ahead score for Louisville, which had to withstand several Miami threats from there for a win that wasn’t decided until late.

Gerod Holliman’s interception of Hurricanes freshman Brad Kaaya and 61-yard return to the Miami 36 as time expired punctuated Louisville’s gutsy defensive showing. Kaaya completed 17 of 29 passes for 174 yards but was sacked twice and threw two interceptions.

“We did not do a good enough job protecting a first-start quarterback. Period,” Miami coach Al Golden said.