Millwall have announced that assistant manager Marc Bircham has left his role at the club to join MLS outfit Chicago Fire.

The 36-year-old, who began his playing career with the Lions, will link up with Frank Yallop in Chicago after a year alongside Ian Holloway at The Den.

"This was a very hard decision to make because I really feel there are good times ahead for Millwall under Ollie," Bircham told the club website.

"But I had almost gone to the MLS earlier in my career, and this time, when the chance came up, it just seemed like such a great opportunity for myself and my family."

First-team coach Nigel Gibbs is expected to be promoted as Holloway's new assistant.