Brooklyn Nets superstar James Harden was left unsurprised by how quickly he adjusted on his return to the NBA, saying "not to brag or anything, but I'm really good at this game".

Harden made his long-awaited comeback from a hamstring injury that sidelined him since April 5, the former MVP posting a double-double as the Nets beat the San Antonio Spurs 128-116 on Wednesday.

Coming off the bench, Harden finished with 18 points on two-for-eight shooting, 11 assists, two steals and two blocks in 26 minutes against the Spurs midweek.

"Not really," Harden replied when asked whether he was surprised by his performance. "Not to brag or anything, but I'm really good at this game. I study the game, I'm very unselfish.

"I take the game and I play it the right way every single night. I don't try to do anything I can't do or anything that doesn't benefit our team. That mindset keeps me in a really good place."

Harden returned from the longest injury lay-off of his stellar career, having missed 18 games for the star-studded Nets, who are eyeing their maiden NBA championship.

It was the first time Harden came off the bench in an NBA game since the 2011-12 season with the Oklahoma City Thunder, winning the Six Man of the Year Award that campaign.

"That sixth man role, I've mastered that as well. You know, I've got an award for that role. That role is easy, coming out and impacting the game. Doing whatever it takes to win -- whether its offensively or defensively," Harden said as the Nets moved to 46-24 for the season to remain second behind the Philadelphia 76ers in the Eastern Conference.

"But that's my role no matter what. Especially on this team -- not necessarily scoring all the time when I don't need to. Communicating, being the leader on the floor, making sure guys are in their right positions defensively. And these last few games, we've been better."

After the Nets improved to 28-7 when Harden plays, the nine-time All-Star said: "I know I can score the basketball, but I take pride in getting guys involved and letting guys be involved in the offense. That way, defensively, they'll all be locked in and it's a lot easier.

"I want everybody to get their shots whether they're close to the rim or three-point shots or whatever the case may be, or just get an opportunity to get a shot. That's something I've been doing throughout the course of my career, especially when I was in Houston. Obviously, Kevin [Durant] and Ky [Kyrie Irving] get their shots however they want. But my job is to get everybody else on this roster easy opportunities.

"When I was sitting out, I had multiple conversations with Steve [Nash] on our offense and kind of putting myself in position to be successful and that means getting guys better shots. It's something that we still continue to work on and these next two days that we have between games and the week after our last regular-season game is very vital to our success in the sense of offensively and defensively getting on the same page."