Assistant referees: Veronica Perez (United States) Marlene Duffy (United States) Fourth official: Quetzalli Alvarado (Mexico) Assistant referees: Helen Karo (Sweden) Anna Nyström (Sweden) Fourth official: Christina Pedersen (Norway) Assistant referees: Marina Wozniak (Germany) Katrin Rafalski (Germany) Fourth official: Carol Anne Chenard (Canada) Assistant referees: Sarah Ho (Australia) Kim Kyoung-Min (South Korea) Fourth official: Sachiko Yamaguchi (Japan) Assistant referees: Hege Steinlund (Norway) Lada Rojc (Croatia) Fourth official: Kirsi Heikkinen (Finland) Assistant referees: Marie-Josée Charbonneau (Canada) Stacy Greyson (Jamaica) Fourth official: Sachiko Yamaguchi (Japan)