PHILADELPHIA - Most things about the United States' upcoming World Cup adventure just aren't knowable yet. When a Turkish reporter, after yesterday's 2-1 U.S. Cup tune-up victory over Turkey, asked U.S. coach Bob Bradley to name his starting lineup for its tournament opener against England on June 12, a team publicist slyly remarked to the reporter: "You must be new here."

Bradley doesn't reveal such things publicly in advance. "I don't know," Bradley said, "if I should give you my first 11 or just call Fabio" - England coach Fabio Capello - "and tell him."

Beyond who will play is the mystery of how they will play. America's designated strikers are young and inexperienced on the top level. Besides Jozy Altidore, who Saturday scored his ninth goal for the national team in his 25th appearance, Robbie Findley, Edson Buddle and Herculez Gomez have only nine games of national-team experience, combined.

Concerns over defensive depth remain as well. And then there is the weather: After two Cup tune-ups the past five days in East Hartford and here, both played in upper 70s heat and high humidity, the Yanks are headed for South Africa, where it is wintertime.

The good news there, said Landon Donovan, the team's rainmaker, is that "this is the end of pushing ourselves" physically as they have the last couple of weeks. Beyond the demands of the two tune-up games, "There's been a lot of running" in the team's pre-Cup training camp at Princeton, Donovan said.

All, Bradley said, according to carefully laid-out plans. After emphasizing fitness in camp and trimming his pool of players from 30 to the Cup limit on 23 on Wednesday, Bradley said the focus has turned to "team-building."

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Crucial pieces of the personnel puzzle, back from injury, "had to get sharper," Bradley said, "and now we'll need to get over the travel." The teams flies to South African Sunday and will play one more pre-Cup match against Australia there on June 5 before the England match.

Turkey, meanwhile, did not qualify for the World Cup, a mere eight years after its greatest Cup result - third place in 2002. The Americans had their best result in 72 years at that tournament, losing in the quarterfinals. (The two teams were eliminated by that year's Cup finalists, Brazil and Germany, respectively.)

What comes next, Bradley couldn't say if he wanted to.