Washington Redskins coach Jay Gruden says he’s having a little trouble sleeping these days.

“I got up a 2 [a.m. Thursday] morning because I couldn’t sleep, so I came in to work,” Gruden said. “Now I’m regretting that, but it’s fun. We have a good group of guys and a great staff. We’ll work hard to get this thing turned around.”

Washington is off to a 1-3 start in Gruden’s first year as the head coach. Now comes the defending Super Bowl champion Seattle Seahawks for a Monday night game at FedEx Field.

That’s enough to make any coach to lose a little sleep.

“It stressful,” Gruden said of his head coaching duties. “I knew it would be stressful, but a little more than I even thought.”

After watching video of the Seahawks, Gruden has a lot of things to stress over. One is receiver Percy Harvin.

“On special teams [as a kickoff return man], it scares the hell of you when he’s back there,” Gruden said of Harvin. “He’s a threat to break it every time. He’s really strong. People don’t give him enough credit for his ability to run through tackles. He could be a starting running back for most teams if he wanted to.

“The way they use him on the fly sweeps, you have to know where he is all the time. If you give him some open space, you’ll be trying to block the extra point on the next play. He’ll be gone.”

Gruden also has concerns about Marshawn Lynch in a game that features two of the best running backs in the NFL, along with Washington’s Alfred Morris.

“Alfred is a great zone runner and has great vision,” Gruden said. “He’s very good at finding holes and getting north.

“Marshawn is a little more angry. He runs angry. He looks to punish people. He may look to run into people more than find holes. He likes contact. You can tell. He’s very physical. So they are a little different in that regard, but both are excellent in what they do.’’