Dallas Mavericks guard Kyrie Irving concedes his side's downward spiral since his trade has been "emotionally draining" but says there is still a glimmer of hope for their playoff aspirations.

The Mavs slumped to their third straight loss with Sunday's 132-130 overtime defeat against the Atlanta Hawks, also leaving them with one win from their past eight games.

The result means the Mavs sit 11th in the Western Conference with a 37-42 record, outside the final play-in tournament spot, occupied by the Oklahoma City Thunder (38-41).

OKC suffered a 128-118 loss to the Phoenix Suns on Sunday to keep the Mavs in contention but the clock is ticking for a franchise who had championship designs when they traded in Irving in February to play alongside MVP contender Luka Doncic.

The Mavs are a lowly 7-12 with Irving since the trade and the All-Star guard said their struggles had been "emotionally draining".

"We've just been losing tough ones, emotionally draining, but at the same time we're professionals," Irving told reporters.

"I think the fun part of it is we still have a glimmer of hope, a glimmer of light at the end of the tunnel of where we can still sneak in.

“But at the same time, I’m at peace with just our effort, with spurts throughout the games. We’ve just got to be able to finish better as a team."

Mavs head coach Jason Kidd, who is under pressure to keep his job, said the team were now playing "catch-up" given their play-in predicament with three games left.

"We know the situation we're in," Kidd said. "We're playing catch-up. We've got to find a way to win and right now we're coming up short when we need to win games. Unfortunately we're not winning right now."

Irving was almost the hero against the Hawks, attempting to steal the ball off Trae Young at 130-130 in the final seconds of OT, only for the referee to call a foul.

Kidd and Irving argued the call as Young hit both of the game-winning free-throws, with the coach calling it a "wild ending".

Irving added: "I know those refs will look back on it and won't be too happy with that call. But it could’ve gone either way. I thought I was great position but that foul cost us game practically."