Arena, the longest serving coach at the finals, plans to address the media on Friday at the U.S. hotel in Hamburg.

Reyna's decision to step down, while not formally announced, comes as no surprise based on his history of injuries.

A veteran of four World Cups, Reyna did not see any action in 1994 but featured prominently in the other three tournaments. In 2002, he helped lead the U.S. to the quarter-finals.

Reyna, who was made national team captain in 1999, has won 112 caps and scored eight goals. He remains one of a handful of Americans players to have thrived in Europe.

In the past 12 years he has played for Bayer Leverkusen, Vfl Wolfsburg, Rangers and Sunderland before joining Manchester City in 2003.