ATLANTA -- While bidding adieu to their nine-game winning streak, the Braves gained further reason to believe Huascar Ynoa has the potential to be one of the front-line starters clubs lean on during the postseason run.

Ynoa was doomed by two powerful Giancarlo Stanton swings in the 5-1 loss against the Yankees on Monday night. But the young right-hander didn’t seem fazed as he navigated his way through an intimidating lineup while pitching in front of a frenzied crowd at Truist Park.

• Box score

“These games will continue to shape us,” Braves shortstop Dansby Swanson said. “In order to be the best, you’ve got to beat the best.”

There was a postseason-like buzz in the air as the Braves hosted the first game since 1901 to feature a pair of teams with a winning streak of at least nine games. Thanks to Stanton’s second-inning leadoff homer and two-run double in the sixth, Atlanta was unable to reward its hometown fans with what would have been the team’s first 10-game winning streak since claiming 14 consecutive wins in 2013.

• Soroka on Achilles: 'No sense being angry'

Swanson’s second-inning leadoff home run gave him his first career 25-homer season. But the shortstop’s 10th homer since the All-Star break wasn’t enough support for Ynoa, who recorded nine strikeouts while allowing three runs on four hits and one walk over six innings.

“Obviously, we didn’t get the results we wanted,” Ynoa said through an interpreter. “But it’s just one of those experiences you have to roll with the punches and learn from.”

With just their third loss in the past 19 games, the first-place Braves (68-57) still have a 4 1/2-game lead over the Phillies (63-61) in the National League East. They were in third place and four games back before beginning this 19-game stretch with an Aug. 3 win in St. Louis. Atlanta was a game out of first place when its nine-game winning streak started on Aug. 13.

“It was a playoff-like game,” Swanson said. “There was a lot of good pitching and a lot of good defense. Each at-bat seemed to be maximized. Neither team had many chances, and when they did have chances, it was with two outs. That was kind of the difference in the game tonight.”

Ynoa is jumping right into this pennant race after missing three months with the fractured right hand he sustained when he punched a dugout bench in Milwaukee on May 16. The 23-year-old hurler returned from the injured list to throw 5 1/3 scoreless innings in Miami on Aug. 17, and he continued to impress when he recorded two first-inning strikeouts in this latest outing.

“We’re still getting him in game shape, and this was another step in the right direction,” Atlanta manager Brian Snitker said. “I thought he was real good.”

Ynoa got ahead of Stanton with a 0-2 count to begin the second inning and then was introduced to his unreal power. The Yankees' behemoth slugger hit a 387-foot, opposite-field homer against a slider that appeared to be at least an inch off the plate. The solo shot landed in the Chop House with the ferocity you would have assumed came off the bat of a left-handed hitter.

“I was happy with that pitch, but he made the adjustment,” Ynoa said. “He’s not any ordinary hitter.”

After cruising through the next few innings, Ynoa got in trouble when he hit DJ LeMahieu with a pitch and then walked Joey Gallo. This set the stage for Stanton to lace a go-ahead two-run double that came off his bat at 119.2 mph, the hardest-hit ball ever struck at Truist Park, which opened in 2017.

Stanton has put just 31 balls in play at this park, but the former Marlins outfielder still accounts for four of the 10 times a player has generated an exit velocity of 115 mph or greater here.

With Charlie Morton and Max Fried, the Braves have two bona fide front-line starters they could carry into the postseason. Ian Anderson might fit that description for a second consecutive season if he returns from the injured list in a healthy and effective manner.

But the wild card down the stretch and into the postseason might be Ynoa, who has a 2.95 ERA through 10 starts this season. He has been successful while leaning heavily on his slider and four-seam fastball. Finding further comfort with his two-seamer and changeup might allow him to be even more successful over the remainder of this season.

“I feel like every time he goes out there, he’s always down to compete,” Swanson said. “That’s something I love about him. He made a lot good pitches tonight. ... He threw the ball well and competed. I’m proud of him.”