Rhiannon Roberts needs a bit of treatment after a cross from Crystal Dunn hits her in the face - but the Wales defender seems fine to continue.

Wales eventually clear the subsequent corner and try to break through Hannah Cain but she's outnumbered by the covering American defenders.

Another USA player runs the ball out of play, this time it's Sophia Smith on the opposite flank.

It's all a bit frenetic so far, with Wales struggling to get hold of the ball.

USA, as you might expect, are on the front foot immediately.

Wales have not got out of their half yet and USA winger Alyssa Thompson dribbles into the penalty area but loses control and the ball goes out for a goal kick.

Katie Sherwood
Former Wales midfielder on BBC One Wales

The main difference between Wales and America is America's mentality and athleticism, everything is about winning.

The fitness level and the stamina - that is what they take to the next level.

USA will get this game under way.

Referee Karen Hernandez blows her whistle and we're off!

Check this out for a fact: this match will mark the first time Wales have ever played a women's international fixture outside Europe.

Quite a few players in the Wales squad - captain Angharad James, Jess Fishlock and Ceri Holland among them - have played domestic football in the USA, though.

Image source, Getty Images

A typically understated rendition of Star-Spangled Banner there.

Gemma Grainger
Wales manager on BBC Radio Wales

We wanted to be at the World Cup, we want to test our game plan, we want to make sure we leave this game knowing more about ourselves.

To play against the back-to-back world champions is the type of game we want.

We know in the Nations League we will need to adapt so this game gives us a chance to test ourselves and we will know more about ourselves as a team moving out of this game.

The teams are making their way out on to the pitch in San Jose, where the sun is beating down and the crowd sound like they're in fine voice.

Anthems coming up. Not long until kick-off now.

There are quite a few Wales players on the move this summer. One of them is defender Rhiannon Roberts, who has signed for Real Betis.

After tonight's game, the 32-year-old will turn her attention to the Spanish top flight, having left Liverpool for a two-year deal at Betis.

"I think I'd been at Liverpool a bit too long," Roberts said.

"Real Betis is something new for me. I am excited to go and play a new style of football and I am excited to test myself against the best and to get on the ball a little bit.

"I wanted to try something different - embrace a new culture and learn a new language. I am looking forward to every part of it."

Katie Sherwood
Former Wales midfielder on BBC Two Wales

We know how relentless and ruthless the USA are in attack, they recover really quickly but with a quick counter attack that is where Wales will be successful this evening.

They are not invincible there are ways we can exploit them.

Image source, Getty Images

Nia Jones
Former Wales international on BBC Two Wales

It used to be catastrophic if you heard Jess Fishlock wasn't available for a Wales game, it's not quite the case anymore.

Jess is the greatest player Wales has ever produced but now she has other fantastic athletes around her such as Angharad James, Sophie Ingle Hayley Ladd.

It's a blow for Wales - and for this game in general in terms of a spectacle - that the visitors will be without their most capped player Jess Fishlock.

Wales had hoped the midfielder could feature for OL Reign on Friday in the National Women's Soccer League and still play a part against the US.

But she was forced off early in Reign's 1-0 loss to Orlando Pride.

Fishlock, 36, went down off the ball in the 23rd minute and received treatment to her hamstring for several minutes before being replaced by Nikki Stanton.

As a result, she'll play no part for her country tonight.

Image source, Getty Images

Carl Roberts
BBC Sport Wales in San Jose

It's 12.40pm here and supposedly 19 degrees Celsius but feels very warm pitchside.

Image source, BBC Sport

Facing the best team in the world away from home?

Wales head coach Gemma Grainger is up for it.

Nia Jones
Former Wales international on BBC Two Wales

This is a huge compliment to how far the women's game has come in Wales, that USA want to play us in their last match before they go and defend their World Cup title.

What about Wales' opponents tonight then?

Four-time world champions, stellar talents everywhere you look: the USA are simply the best team on the planet.

In Megan Rapinoe and Alex Morgan, they boast two of the world's most recognisable athletes, never mind two of the best footballers around.

Rapinoe, Morgan and defender Kelley O’Hara are set to play in their fourth successive World Cup, while goalkeeper Alyssa Naeher and midfielder Julie Ertz are preparing for their third in a row.

Wales know they're up against it in San Jose. This is the toughest challenge they've faced yet.

Image source, Getty Images

When Gemma Evans joins Manchester United for pre-season training, she'll be linking up with her Wales team-mate Hayley Ladd.

The Wales and United defender has been sharing her thoughts about tonight's friendly against the USA in her latest column for BBC Sport Wales.

Ladd describes this game as a "huge step up" for Wales.

You can read the full column here.

Image source, FAW

Carl Roberts
BBC Sport Wales in San Jose

There's a DJ entertaining the crowd here in San Jose as Wales take to the field for their warm-up.

There's a party atmosphere here for the hosts' World Cup send-off.

Image source, BBC Sport

Image source, Getty Images

Another Wales player with a new club is defender Gemma Evans, who has joined Manchester United.

The 26-year-old has signed a two-year contract with the Women's Super League title contenders following her departure from Reading.

"It's a massive honour to sign [for United]," said Evans, who starts tonight's game.

"It's something I've dreamed about."