Philadelphia Eagles head coach Nick Sirianni stressed that Monday's 32-21 loss to the Washington Commanders will only turn them into a better football team, despite having their run defense exploited in an eye-opening first loss of the season.

The Commanders came in with a clear game plan to limit the undefeated Eagles' time of possession, favouring long, grinding drives leaning heavily on their running game.

It led to Washington carrying the ball 49 times – one carry away from the season-high of 50 set by the Eagles in their Week 4 win against the Jacksonville Jaguars.

That in turn gave the Commanders over 40 minutes of possession, while the Eagles had less than 20 minutes.

Despite their lack of possession, the Eagles pulled the margin back to 23-21 in the fourth quarter, but gave up three fumbles down the stretch to torpedo their own chances of a comeback.

The cracks shown in the Eagles' run defense come at a bad time, with upcoming fixtures against elite running backs Jonathan Taylor of the Indianapolis Colts, Aaron Jones of the Green Bay Packers and Tennessee Titans superstar Derrick Henry.

Sirianni said right now all of his focus is on Taylor with the Colts coming up in Week 11, and that he knows his team will have to show they can stop the run to avoid being attacked in that fashion.

"I'm only worried about Jonathan Taylor at this point," he said. 

"Obviously we'll have to go look at this tape and see what went down in this game, knowing that when you show you can be attacked in a certain place, we're going to see it again.

"We'll work like crazy to get it fixed, and we understand that will be the narrative of how to beat us. We've got to own that, we've got to fix it, and we will." 

Sirianni refused to blame a crucial missed penalty by the referees in the fourth quarter, resulting in a fumble, saying his team needs to accept responsibility for their first loss.

"[The refereeing] is not at all what lost us the game," he said. "That's pretty simple, the three turnovers lost us the game, the time of possession loses you the game, we lost it together. 

"Offense, defense, special teams, coaching – we lost it together. We've got to protect the ball better. We didn't do a good job of that all game, we were loose with that football, it came out, and they got it.

"I give them a lot of credit, I think that's a good football team and I have a lot of respect for coach [Ron] Rivera. So I don't like to ever say we lost it, they played and they played well.

"But we know that we made mistakes, we made uncharacteristic mistakes, so it's both. We give them all the credit, but we did not play our type of game, we made mistakes, we had penalties, we had uncharacteristic fumbles, we threw an interception.

"We [as coaches] didn't do a good enough job, there's some things we want back as calls, I didn't do a good enough job coaching this week… that loses you football games in this league."

Sirianni finished by adding: "We started 8-0 together, we lost this game together, we're going to move on together. We'll get better from this."