Greetings again from downtown Detroit. The People Mover is easy and efficient, Greektown is fun and delicious, and, despite the city’s well-documented problems, the vintage architecture endures. It’s been a nice visit, and tonight the Motor City welcomes the U.S. national team for the first time since Eric Wynalda’s free kick gem against Switzerland in the 1994 World Cup at the suburban Silverdome.

My match preview focuses on the importance of the Gold Cup and the Americans’ urgency to rebound from the Spain fiasco. Kickoff against Canada will take place around 8 p.m. ET on Fox Soccer Channel, Telefutura, and

CONCACAF officials are hoping for a good walk-up crowd to lift attendance to between 25,000 and 30,000 — a quality showing for a Tuesday night in a economically ailing city that lacks a strong soccer foundation.

For the second time in four days, the Americans will play on temporary grass covering artificial turf. According to the players, the Detroit surface is an improvement over Foxborough’s faux field.

“This one feels a little more natural,” midfielder Maurice Edu said.

“You get the same issues all the time — kind of spongy, but it’s okay,” goalkeeper Tim Howard said.

Meantime, Detroit — and more specifically, the Silverdome property — is a longshot for MLS expansion.

Much more.....

In Gold Cup action Monday night in Carson, Calif., Jamaica continued the tournament’s torrid scoring pace with a 4-0 victory over Grenada, but then Group B favorite Honduras settled for a 0-0 draw against nine-man Guatemala.

For a glance at the Gold Cup, click here.

From Tehran, The Post’s foreign bureau reports on the controversy involving the Iranian women’s national team.

Soccer on TV:

Friendly, Russia-Cameroon 12:45 p.m.

Euro qualifier, Azerbaijan-Germany 1 p.m. ESPN Deportes,

Euro qualifier, Bosnia-Albania 1:30 p.m.

Euro qualifier, Hungary-San Marino 1:45 p.m.

Euro qualifier, Sweden-Finland 2 p.m.

Gold Cup, Panama-Guadeloupe 6 p.m. Galavision,,

Gold Cup, USA-Canada 8 p.m. Fox Soccer Channel, Telefutura,,

Friendly, Venezuela-Spain 8 p.m. Galavision

Friendly, Brazil-Romania 8:45 p.m. ESPN Deportes,