Memphis Depay scored his first Manchester United goal in a 3-1 pre-season win over Major League Soccer side San Jose Earthquakes.
The £31m Dutch forward took advantage of a poor backpass to score United's second, eight minutes before half-time.
Juan Mata had earlier put Louis van Gaal's side in front, before Fatai Alashe pulled one back for the hosts.
Andreas Pereira scored the third for United, who were watched from the stands by ex-boss Sir Alex Ferguson.
The Red Devils have won both games of their United States tour so far, but they can expect a much tougher test when they face Spanish champions Barcelona in Santa Clara on Saturday (21:00 BST kick-off).
How did Manchester United line-up?
First-half team: Johnstone, Darmian, Jones, Blind, Shaw, Mata, Carrick, Schneiderlin, Young, Depay, Rooney.
Second-half team: Johnstone, McNair, Smalling, Evans, Blackett, Lingard, Schweinsteiger, Herrera, Pereira, Januzaj, Wilson.
Van Gaal on speculation over Angel Di Maria's future
"It is a process. It's what I always say. When we think we have to say something I shall say it. He will come to the tour on 25 July."
Will United buy a striker?
"I don't know if I want to buy a striker. I have read in the media that the striker is a surprise. No. That is not what I said. You are saying that. No. I mean something else."
"Players can play bad. When you only have six days training in your legs and you have to play 45 minutes, everybody thinks it is easy to step in but it is not.
"I think the first match he played very well. Today he played bad."
De Gea's fitness
"I have good hope that he can play against Barcelona on Saturday. He was still injured for this match, Anders Lindegaard was also injured.
"I said to De Gea, go stand in the goal so we had a point of direction for my attackers. But don't do anything to risk your injury more. I think he can play on Saturday."
|Manchester United US pre-season tour|
|1-0 v Club America||Friday, 17 July||CenturyLink Field, Seattle|
|3-1 v San Jose Earthquakes||Tuesday, 21 July||Avaya Stadium, San Jose|
|v Barcelona||Saturday, 25 July||Santa Clara|
|v Paris St-Germain||Wednesday, 29 July||Soldier Field, Chicago|