The United States men’s national team is back in action on Friday. After a resounding win against Paraguay in its opener, the U.S. takes on an Australia team that also had an impressive win to start its World Cup. The top spot in Group D is on the line.Here’s a look at what to watch in Friday’s four matches as well as the odds and some picks from our betting staff.Why this World Cup Golden Boot race is so unusualDan SantaromitaUnited States vs. Australia (Group D)Standings: United States (3 points, 1st), Australia (3 points, 2nd)Time: 3 p.m. ETTV: Fox (English), Telemundo (Spanish)Venue: Lumen Field, SeattleWhat does the U.S. have in store after the euphoria of the 4-1 win against Paraguay?The Americans ran roughshod over their South American foes a week ago, but Australia could be tougher opposition. The Socceroos beat Turkey 2-0 in their opener and looked good doing it. That means this game will likely decide the Group D winner.The United States hasn’t won back-to-back games at a World Cup since their first two games in the inaugural edition in 1930. They are favored in this match to do so, but could be without star winger Christian Pulisic. Pulisic has been training separately from his teammates, which is not a good sign for his availability. Manager Mauricio Pochettino has the benefit of making the decision to play or rest Pulisic with three points in hand. Even a draw makes advancement to the knockout stage very likely.Even without Pulisic, the Americans have several players who should be playing with tons of confidence after strong performances in the opener. Just among the attackers, Folarin Balogun played a starring role with two goals and Gio Reyna came off the bench and scored with a beautiful finish.Scotland vs. Morocco (Group C)Standings: Scotland (3 points, 1st), Morocco (1 point, T-2nd)Time: 6 p.m. ETTV: Fox (English), Telemundo (Spanish)Venue: Gillette Stadium, Foxborough, Mass.The Tartan Army has taken over the Boston area. Their opener against Haiti and this match against Morocco are in Foxborough, Mass., so the Scots have been creating a second home for the past week.