After a rough start to the season, the Saints took another major step forward Sunday in London, topping Miami 20-0 for their second straight victory.

The back-to-back wins boosted the Saints to a 2-2 record, a major accomplishment after the team stumbled to two losses to start the season.

On Sunday at London's Wembley Stadium, New Orleans started slowly before finding its footing and dominating the second half against the Dolphins.

The Saints did most of the damage through the air. Drew Brees was 29-41 for 268 yards and two touchdowns. One of those went to running back Alvin Kamara, who hauled in 10 catches for 71 yards.

Kamara's touchdown with four minutes to go in the game helped seal the deal, as he took a shovel pass from Brees 12 yards for a touchdown, and a 20-0 lead.

Michael Thomas had 8 catches for 89 yards and a touchdown. His 3-yard touchdown catch capped a 77-yard Saints drive to open the second half.

Kicker Wil Lutz was two for three on field goal attempts, hitting from 43 and 45 yards.

The shutout by the defense was the team's first since a 41-0 victory of over Tampa Bay in 2012. The Saints held the Dolphins to 185 total yards and also registered four sacks.

The game, played on a soccer pitch, remained a nil-nil draw through nearly the entire first half. Lutz finally broke the stalemate on the last play of the half with a 43-yard field goal to put the Saints up 3-0.

The first quarter was marred by a communications issue on the Dolphins sideline. Out of fairness, the Saints' systems were turned off, forcing both teams to use hand signals for coach-to-player communications.

The NFL said the systems were restored by the start of the second quarter.

All in all, the first half was sloppy, with numerous penalty flags on both teams. Miami's best chance of scoring, in the opening drive, ended with Ken Crawley's interception in the endzone.

The Saints also came up short on its first drive as Lutz went wide right on a 41-yard field goal attempt on the first play of the second quarter.

Hot off a Week 3 win over Carolina, the Saints traveled across the pond for a crucial contest for a team trying to get to .500 after an 0-2 start.

The New Orleans defense -- and its secondary, in particular -- looked better last week and again in Week 4 after struggling in the first two games.

Last week's success came against a mediocre Carolina wide receiver group and a quarterback still working back from injuries. This week, the Saints were tasked with slowing a wide receiver corps that has De’Vante Parker, Jarvis Landry and Kenny Stills.

When the NFL released its schedule in April, New Orleans knew it was staring at a brutal early slate, with three games on the road against good teams before the bye.

The Saints will face a pair of NFC North powers in Detroit and Green Bay looming after a bye in Week 5.