The Chargers are now 3-1 after a disappointing 21-18 road loss to the Giants on Sunday.

Here are five takeaways from Week 4.

The Chargers had pretty much done everything right during their 3-0 start to the season, whether it was getting out to an early lead, playing disciplined or making clutch plays late in the fourth quarter.

But on Sunday in New Jersey, the opposite happened.

The result was the Chargers first loss of the season, a three-point defeat to the previously winless Giants where the Bolts simply couldn’t make a big play to help turn the tide.

“It stings. Guys fought, guys battled,” Chargers Head Coach Jim Harbaugh said. “I wasn’t able to put ourselves in a position to win the game, but our guys kept battling.”

He later added: “We were able to come up with some plays, just not enough … [we have] things to refit and things to get better at. But love the never give up [attitude].”

A key reason why the Bolts came up short in Week 4?

They lost the turnover battle 2-0, something Harbaugh prides his team on winning more often than not.

Those pair of miscues led to 10 Giants points as New York was inside the Chargers 5-yard line after both interceptions.

“Losing is tough, obviously,” Daiyan Henley said. “As a defense, I feel like we had our moments both good and bad. We just had to put together a full game and we didn’t do that as a defense. That’s what it comes down to.

“In our wins, we talk about how we can do better and in our losses, we talk about how we can do better,” Henley added. “Us as a defense, we know we have to get those turnovers, they got turnovers on their side of the ball. We got to return the favor and that’s where we lacked today.”

Overall, the Chargers outgained the Giants in total yardage by the count of 338 to 250.

But a slow start — the Chargers trailed 10-0 early in the second quarter — meant the Bolts were playing catch up for most of the afternoon at MetLIfe Stadium.

Even so, the Chargers had multiple fourth-quarter possessions down by three points where they could have tied the game or taken the lead.

“We had our shot and we didn’t execute. That’s on us as an offense,” Justin Herbert said. “I thought the defense battled all day, did a great job getting those stops.

“Just on us to be able to execute and make sure we’re moving forward,” Herbert added.

Players in the postgame locker from talked about learning from this one before turning the page to a Week 5 home game against the Commanders.

“Get together, watch film, talk about it with each other,” Omarion Hampton said. “Move onto the next week, get over it and see what we could do better really.”

Tuli Tuipulotu added: “We’ve got to learn from it and bounce back.”

But Trey Pipkins III summed up the day in a few succinct words.

“Not good enough to win,” Pipkins said.