As Celtics guard Evan Turner basked in the afterglow late Friday night of his team’s 113-94 win over the Magic, he was asked about the emergence of Boston’s second unit.

During this five-game winning streak, and even for some time before that, the Celtics’ reserves have often carried much of the weight. Turner is a key component of this group, and he insisted that its strong play should hardly be considered astonishing.

“Most of the year we’ve been getting it done for the most part, from what I remember,’’ Turner said. “We always cut into leads or push leads up. We do what we need to do. That’s what it is. We’ve been killing [the starters] in practice, too.’’

Then, as is his wont, Turner spiced up the self-encomium. He said that in practice sessions against the Celtics’ starters, the reserves have had a success rare similar to that of the UConn women’s basketball team, which is 98-1 over the last three seasons.

“We’ve been at like that level,’’ Turner said with a smile. “It’s been low-key. Nobody’s been writing about it, but we’ve been confident.’’

While Turner’s claim is surely spiced with hyperbole, it’s conceivable that the backups have gotten the better of the first unit during scrimmages at the team’s Waltham training facility.

The Celtics’ depth has never been in question. For much of the season it was used to fill gaps created by injuries. Now, with everyone healthy, the depth is being used to wear down opponents whose talent drop-off is more severe when they call upon their backups.

In Friday’s win, the Celtics’ reserves scored 62 points, and they spearheaded the defining 15-0 fourth-quarter burst that flattened the Magic.

“It takes practice time and games to play together, and I think we’re starting to find each other on the court and we’re starting to get a rhythm,’’ reserve forward Jonas Jerebko said. “It’s starting to show.’’

Coach Brad Stevens seems to have settled on an effective nine-man rotation. Of course, that means the second group must always include at least one member of the first group. Recently, that has most often been shooting guard Avery Bradley.

Stevens has used two lineups far more than any others recently. The first, obviously, is the starting group, which includes Bradley, Isaiah Thomas, Amir Johnson, Jared Sullinger, and Jae Crowder. In the second unit, Bradley has been joined by Jerebko, Turner, Marcus Smart, and Kelly Olynyk.

In 129 minutes over the last 10 games, the starters have a net rating of minus-3.9, meaning they are being outscored by an average of 3.9 points per 100 possessions. Meanwhile, over that same period the second unit has a net rating of plus-15.1 over 85 minutes.

“There’s times where [the second group is] playing well enough where you want to play them for 18 straight minutes or 16 straight minutes,’’ Stevens said.

On many teams, a backcourt that includes Smart and Turner may not be sustainable for long stretches, simply because they shoot 23.8 and 14.8 percent on 3-pointers, respectively. But the Celtics possess the rare second unit whose most dangerous long-range shooters are in the frontcourt.

Olynyk is shooting 44.4 percent from beyond the arc, sixth best in the NBA. Jerebko attempts just 1.1 3-pointers per game, but he is making 44.2 percent of them. When Bradley (36 percent) is added to the mix, three of the Celtics’ four best shooters percentage-wise are on the court at once. And in Turner and Smart, Boston has two physical ballhandlers who are capable of cutting into the teeth of a defense.

“You have unique people out there who play multiple positions and are very versatile,’’ Smart said. “It’s hard for any team coming in.’’

Despite Turner’s claim, the backups’ ascension does not serve as evidence that this group is more powerful than the first unit. After all, the Celtics’ starters are the ones who tussle with other teams’ stars. But there is definitely a sense that Stevens and the Celtics may have hit on something big, something important.

“I feel like we’re finding our way,’’ Jerebko said.

Adam Himmelsbach can be reached at adam.himmelsbach@globe.com. Follow him on Twitter @adamhimmelsbach.