Christian Pulisic starts for the USA at the Al Thumama Stadium in Qatar for the decisive World Cup group clash with Iran in Group B.
USA know that only a win will take them through to the knockout stages to face either the Netherlands or Senegal in the last 16, depending on whether they finish top or second in the group.
Pulisic has started all of his nation's games at the tournament so far, impressing against England in Friday's 0-0 draw after setting up their only goal of the finals against Wales in the opener for Timothy Weah. The 23-year-old will be relied upon to provide a moment of inspiration on a tense night as an inspired Iran hope to seal a shock win.