Tom Brady
Tom Brady could not help the Patriots mount a comeback against the Jaguars. In this picture, Brady walks off the field during the second half against the Jaguars at TIAA Bank Field in Jacksonville, Florida, Sept. 16, 2018. Scott Halleran/Getty Images

The New England Patriots (1-1) must learn from their "bad day" against the Jacksonville Jaguars (2-0), according to quarterback Tom Brady.

In what was a rematch of last season's AFC Championship game, the Patriots suffered a 31-20 defeat Sunday night in Jacksonville, but were shockingly down 21-3 by the end of the first half.

During those first two quarters, Brady was only able to manage 107 yards on 12-of-18 passing. The 41-year-old was also seen hitting out at his teammates after a wasted drive in the first quarter.

As he had done many times before, Brady tried to mount a comeback in the second half but it wasn't enough as a fourth-quarter touchdown from wide receiver Dede Westbrook sealed the victory for the home side.

While much of the buildup toward the game was the matchup between Rob Gronkowski and Jalen Ramsey, with Tashaun Gipson Sr. eventually marking the Patriots tight end, it was Jacksonville's quarterback Blake Bortles who stood out, outplaying Brady with four touchdown passes and an interception on 29-of-45 passing for 377 yards.

Brady, in contrast, finished the game with 23-of-35 passes for 234 yards, two touchdown passes and no interceptions.

"It’s a long year. You have a bad day against a good team, that’s a recipe for losing," Brady said after the loss, as quoted on CBS Boston. "We certainly had a bad day. You’ve got to learn from bad days. Things just don’t magically happen. You’ve got to make them happen."

"All of us have to have more urgency to do things right more often over the course of practices and games. Then it’s a matter of us going out and executing," he added.

Brady refused to blame the weather as well, with temperatures reportedly rising to 97 degrees at kickoff.

"I actually don’t think it was that bad. At least, I didn’t feel it," he stated. "It was definitely warm, warmer than what we’ve had, but it was a lot like training camp this year. I think it was more the execution. They executed really well, we didn’t. I think it’s really that simple. If we want the outcomes to change, we’ve got to do things a lot differently."

Meanwhile, Patriots head coach Bill Belichick, who also didn't use the heat as an excuse, felt his side didn't do enough in any area.

"We didn’t do a good enough job in any area, so it’s a long list," Belichick said, according to NESN. "Playing, coaching, every part of the game just wasn’t good enough. There was a lot of things we could have done better today. There’s a lot of them. Long list."

As for the Jaguars, the win not only served as revenge for their loss to the Patriots last season, but also established themselves further as serious contenders.

"You have to be realistic," defensive tackle Malik Jackson said. "They're [Patriots] still the team at the top. It's only Week 2, but we did a great job of putting ourselves in position to take that over."

The Patriots will play the Detroit Lions next while the Jaguars face the Tennessee Titans.