The U.S. U23 MNT is back in action this week, as the Concacaf Olympic qualifying tournament finally begins.

There are plenty of questions that the U.S. faces in the coming week, with the possibility of four or five games on the docket.

It could be three and out as well, if things don’t go well in the group games. Which individuals will step up and contribute to success in Mexico? Here are four key players.