Watch: Alex Morgan scores five goals as US rout Thailand 13-0 at FIFA World Cup

Reims: Holders United States began their title defence by recording the biggest win in Women's World Cup history as Alex Morgan scored five goals in a 13-0 demolition of hapless Thailand on Tuesday.

The USA, who won the World Cup for a third time in Canada four years ago, scored 10 in the second half in Reims as they bettered Germany's 11-0 win over Argentina in 2007 and shattered their own previous tournament best of 7-0.

Rose Lavelle and Samantha Mewis netted twice each while Lindsey Horan, skipper Megan Rapinoe and substitutes Mallory Pugh and Carli Lloyd also got on the scoresheet in an embarrassingly one-sided Group F encounter watched by more than 18,000 at the Stade Auguste-Delaune.