Luquinhas celebrates the first goal of the match with his Red Bulls teammates. (Geoff Burke-USA TODAY Sports)

Whatever the Red Bulls are doing on the road this year, they should find a way to bottle it.

They won yet again away from Red Bull Arena, for the seventh time as they registered a 3-0 victory over D.C. United in the Round of 32 of the Lamar Hunt U.S. Open Cup at Audi Field in Washington, D.C. on Tuesday night.

The Red Bulls are 7-0 on the road across all competitions, including two wins in the Open Cup.

Luquinhas led the way with a goal and an assist.

“We are right now very happy we are in the next round,” Red Bulls head coach Gerhard Struber said. “I expected today from my boys that we go with all our power in this game. We can see I think the first half was not a big eye-catcher for every supporter in the whole stadium.”

But it was good enough for the Red Bulls.

Three minutes into first-half stoppage time, Luquinhas converted a side pass from Dru Yearwood past goalkeeper Rafael Romo from 12 yards.

He turned playmaker three minutes into the second half. The Brazilian midfielder raced down the right flank and fired a pass to John Tolkin at the top of the area as the defender drilled the ball home for a two-goal advantage.

“He’s a baller,” Tolkin said of Luquinhas. “He’s always beating guys on the dribble, getting into great spaces. He’s just wonderful on the ball. If I can remember correctly, I think it was [Tom] Barlow running at the front post and then I kind of saw an opening by the penalty spot. Usually I run to the back post but you know what, I’ll change it up this time, and sure enough, the ball found my foot.”

Substitute Zach Ryan scored his first professional goal on his first touch of the match, slipping in Cameron Harper’s right-wing feed a minute after entering the match in the 68th minute.

Red Bulls captain Aaron Long, who scored his third goal across all competitions in a 1-1 home draw with the Portland Timbers on Saturday night, left the game in the 11th minute with a leg injury. Lucas Monzon, who replaced him, needed to be subbed by Ryan in the 67th minute.

Goalkeeper Ryan Meara recorded the clean sheet.

“What I’m most focused on right now is tuned in defensively,” Tolkin said. “We don’t give up goals. We’ve done our job.”

The Red Bulls will try to make eight straight on the road at the Philadelphia Union on Saturday.

It will be a battle for first place as the second-place Red Bulls (5-2-3, 18 points) will try to supplant the Union (5-1-4, 19) at the top of the Eastern Conference.

“Philadelphia is a team at the moment, they have in all four phases, answers and always connected with a good intensity and good aggression,” Struber said. “This is for us, one more time, a big challenge. I always love to play against Philadelphia, we are not always successful against them, but games against Philadelphia, let us grow, let us develop in a good direction.”