Sean Marks says the Brooklyn Nets must improve their "level of compete" after head coach Jacque Vaughn was fired.

Vaughn was dismissed on Monday after the Nets lost 136-86 to the Boston Celtics last week, leaving Brooklyn at 21-33 and 11th in the Eastern Conference heading into the All-Star break.

The Nets had made the postseason in the last five seasons, but a 6-18 run has left the team with it all to do if they are to keep their playoff streak going.

Nets general manager Sean Marks pointed to a perceived lack of effort as one area that must be fixed by the new head coach.

"It's about the level of compete," Marks told reporters. "We're not going to be the most talented team in the league. I'm not an idiot. I totally understand that.

"But at the same time, this is a talented group of young men out there. And my expectations, and I think their expectations, should be to hold each other accountable to do the little things. The effort plays, the loose balls, the contested shots and so forth, diving on the floor.

"These are things that should be expected when you're in a place that we're at right now, where we're clawing and grappling for every single thing we can. That's what I would hope to see over these next 28 games, and that's probably, to be quite frank, some things I haven't seen. The level of effort and the level of compete has not always been there."

Many pointed to the Nets' 144-122 defeat against the Milwaukee Bucks as the reason for Vaughn's firing. The Nets were fined $100,000 for violating the NBA's player participation policy after choosing to both rest and sit a number of key players.

However, Marks said the Bucks drubbing was not the reason for Vaughn's exit, commenting: "I don't think we lost the team that day.

"I appreciate the fact that players want to play. They want to play night in and night out.

"Again, I don't think there was one decision that ultimately affected the record or [making] this decision this day. I think a lot of things went into that."