Live NWSL video: Washington Spirit vs. Portland Thorns

As the National Women's Soccer League enters its fourth week, two teams remain unbeaten. They face off against each other Saturday night.

Washington isn't the most star-studded team, but the Spirit don't lack for firepower. Young U.S. women's national team sensation Crystal Dunn is complemented by Canadian midfield playmaker Diana Matheson, a Princeton product who's one of the most decorated players in her national team's history.

The Spirit's defense is anchored by Ali Krieger, and don't be surprised if the U.S. national team right back often gets up into the attack too. In the middle is another Penn State product, Joanna Lohman, who I'm sure those of you who watched the Independence still remember fondly.

As for Portland, you likely know the big names by now: Tobin Heath, Lindsey Horan, Meghan Klingenberg, Allie Long and Emily Sonnett are all U.S. national team stalwarts.

You might not have heard of Thorns manager Mark Parsons, who's in his first year at the helm in the Rose City. He's a big reason why this team is not just stacked with talent, but delivering results too. Before getting the Portland job, Parsons managed the Spirit throughout the NWSL's first three seasons.

Kickoff at the Maryland SoccerPlex in Boyds, Md. - 11 miles west of the Shady Grove Metro station, if you've ever wondered - is set for 7:00 p.m. Eastern.