Postpublished at 19 mins
USA 1-0 Thailand
19 minutes in and USA goalkeeper Alyssa Naeher has had two touches of the ball.
Redundant.
USA secure biggest margin of victory in World Cup history
Morgan heads in opener, fires in four more
First player in Women's World Cup history with five goals and two assists in same match
Lavelle (2), Horan, Mewis (2), Rapinoe & Lloyd also on scoresheet
Shamoon Hafez
USA 1-0 Thailand
19 minutes in and USA goalkeeper Alyssa Naeher has had two touches of the ball.
Redundant.
USA 1-0 Thailand
She has had a few goes now, but none of her efforts have worked the goalkeeper yet.
Samantha Mewis picks the ball up 25 yards out and strides forward, but then skews a shot wide.
USA 1-0 Thailand
BBC Four
"This could be a very big score," says Jonathan Pearce on BBC comms.
Too right.
You can watch the game on BBC Four or at the top of this page.
USA 1-0 Thailand
The goal ends a stretch of 302 minutes without scoring for Alex Morgan, her third-longest goalless drought since February 2015.
USA 1-0 Thailand
Tom Garry
BBC Sport at Stade Auguste-Delaune, Reims
It was on a plate for Alex Morgan and she doesn't miss those!
This expectant crowd have the early goal they wanted. Around half of them have American flags and they're all being waved in the air now.
USA 1-0 Thailand
Sue Smith
Former England forward on BBC Four
It was a really good bit of play from Kelley O'Hara. She has so much energy, she looked to join in and what a lovely little dinked ball in for Alex Morgan.
She knew exactly where Morgan was going to be.
Alex Morgan
It's the USA superstar, she is off and running.
The defending champions take a deserved lead through Alex Morgan, peeling off Natthakarn Chinwong at the back post and nodding in from Kelley O'Hara's cross.
That's Morgan's 102nd international goal, she will not have scored many more easier.
USA 0-0 Thailand
Sue Smith
Former England forward on BBC Four
The one thing this Thailand side will do is work hard and get stuck in. They have got big hearts.
USA 0-0 Thailand
The tall Samantha Mewis is causing lots of problems for the Thailand players, who are lacking a few inches.
Mewis makes a late dart into the box ala Frank Lampard, but her first time effort from Kelley O'Hara's cross goes wide.
USA 0-0 Thailand
Sue Smith
Former England forward on BBC Four
Alex Morgan has been brilliant linking up the play. That's what America have got though, that real quality to make a difference all over the pitch.
USA 0-0 Thailand
All USA, Thailand have barely got out of their own box.
Tobin Heath tries a cheeky lob from out wide, but it drifts over the crossbar.
USA 0-0 Thailand
Tom Garry
BBC Sport at Stade Auguste-Delaune, Reims
Already, with that aerial ball in to the box, you could see the advantage this American squad have over Thailand in terms of height.
On average, this Thai team are 5ft 4in tall, with nobody in their squad over 5ft 9in.
Crosses in to the box could be a huge asset for the USA tonight.
USA 0-0 Thailand
Sue Smith
Former England forward on BBC Four
I still think Alex Morgan was onside looking at the replay. I think she is in line.
It's frustrating for us watching the game.
USA 0-0 Thailand
USA superstar Alex Morgan, 29, comes into the tournament at her peak having been short of match fitness four years ago.
The Orlando Pride striker has a remarkable 101 goals for her country and is affectionately known at her club as 'The Boss'.
She was named in Time Magazine's 100 most influential people of 2019.
USA 0-0 Thailand
USA have the ball in the back of the net through Alex Morgan's tap-in...
...but it is ruled out for offside.
Sukanya Chor-Charoenying had come for a cross and not got to it, a lucky escape.
USA 0-0 Thailand
Thailand goalkeeper Sukanya Chor-Charoenying is going to see a lot of action today...
USA 0-0 Thailand
Sue Smith
Former England forward on BBC Four
The USA have got so much experience and they are winners. If they don't get to the latter stages of competitions they see that as a failure.
USA 0-0 Thailand
USA already peppering the Thailand goal.
Samantha Mewis' long ranger is parried by goalkeeper Sukanya Chor-Charoenying but gathered at the second attempt.
USA 0-0 Thailand
Tom Garry
BBC Sport at Stade Auguste-Delaune, Reims
Well Sham [19:53], put it this way, we didn't have any today...
Meanwhile, the USA fans gave a hugely respectful cheer for the Thailand players at the end of their national anthem. A good gesture.
USA 0-0 Thailand
Expecting a quick start from USA. An early goal for them we could see a big score...