One of the biggest benefactors of Pochettino's new tactical approach was McKennie, who played in a new role as an attacking midfielder alongside Malik Tillman and Pulisic. While the traditional central midfielder isn't penciled in as a lock for that role just yet, it did offer a glimpse into how McKennie could be effective under Pochettino.
As a result of his solid tackling, relentless running, and typically strong work rate, he often gets miscast as a defensive midfielder - a role that requires players to sit back and kill attacks from the opposition.
But against both Ecuador and Australia, McKennie was effective in playing more like Yaya Toure during his Manchester City days. Toure used to serve as City's No. 10, but he was more combative in the role than being a facilitator. And McKennie, although not as dominant as the Ivorian, did many of the same things.
He was pressing up high and capitalizing on the team's mistakes at a higher on-pitch position to create attacks for the U.S. on the break. And playing such a role requires top fitness, which the midfielder - at times - has come under criticism for. Those issues didn't appear to hold him back during national team duty, with McKennie saying it came down to a challenge issued by Juventus manager Igor Tudor.
"My coach back at Juventus, Tudor, really put pressure on me and said, 'Hey, you're getting older, and your body's not gonna be able to bounce back from games the way that you used to be able to, and you need to cut down some weight, and that's the only way you're gonna be involved with this team,'" McKennie told TNT. "So I put my head down and worked like I usually do. Got on a diet. Don't snack as much anymore. If I do, it's healthy snacks, and I work out more often.
"So that's what I've been doing, a lot of running. This summer was the first summer I didn't mind taking my shirt off at the pool."
McKennie's renewed fitness helped him on the club level. After having an inconsistent role at the start of the season, McKennie played 90 minutes in draws against Villarreal in the Champions League and Milan in league action. They face Cesc Fabregas' surprising Como on Sunday.
The former Arsenal star is a shareholder at the side, but he's more than proved his merit as a manager with the tight-budgeted Como sitting eighth in the league. Juventus have slipped to fifth, but have a chance to get back on track. Both sides are stout defensively, tied on goals allowed with five - good for third in Serie A. But Como have struggled scoring, sitting mid-table in goals scored with seven.