T he winter transfer window has been unexpectedly busy in the women's game, especially as a flurry of U.S. women's national team players swap the NWSL for teams in Europe. Naomi G

US Women’s National Team (USWNT) defender Naomi Girma has become women’s soccer’s first ever million-dollar player, joining English champion Chelsea from San Diego Wave FC.

USWNT defender Naomi Girma has completed her move from the San Diego Wave to Chelsea and become the most expensive transfer in women’s soccer history.

U.S. women's national team defender Naomi Girma is the first million-dollar transfer in women's soccer history. San Diego Wave FC and Chelsea FC announced their deal on Sunday as Girma is now part of the London giants,

American soccer star Naomi Girma became the first female soccer player to command a $1 million deal as she moved to an English team. NBC News' Steve Patterson reports.

United States defender Naomi Girma has become women’s soccer’s first million-dollar player. Who else is on the list of most expensive transfers?

You would be forgiven while watching Chelsea beat Arsenal 1-0 on Sunday for wondering why the reigning five-time Women’s Super League champions needed Naomi Girma. The world-record $1.1million (£900,000) signing was announced on the Stamford Bridge pitch before kick-off and then watched her new side effectively wrap up the title with 10 games remaining.