Nick Kyrgios has taken a swipe at Tennis Australia for axing Bernard Tomic from the Davis Cup team, revealing he didn't believe his close friend should have been dumped.

After his fourth round exit from Wimbledon on Monday, Kyrgios spoke for the first time about the drama surrounding Tomic and Tennis Australia.

It had been feared Kyrgios would pull out of this month's Davis Cup tie against Kazakhstan in Darwin, but the 20-year-old denied he would do so on Sunday, taking to Facebook to reaffirm his commitment.

However, he did admit Tennis Australia shouldn't have punted Tomic from the Davis Cup team after his scathing attack on Pat Rafter and TA officials last week.

"Uhm, no, I don't think so," Kyrgios said when asked if Tomic deserved to be dropped.

"Well, I mean, I think the ultimate goal is to win the Davis Cup. That's why we're playing it. I mean, is it not? And he's Australia's No. 1. I think out of all the players, he's the best on a grass court that we have. So, yeah, I mean, I'm sure we could put him in."

Australia's Davis Cup captain Wally Masur says Tomic has to resolve issues with Tennis Australia before he can make a return to the national team, which was announced on Monday.

Kyrgios will join Lleyton Hewitt, Thanasi Kokkinakis and Sam Groth in Darwin, but Masur remains hopeful Tomic will sort out his gripe with Tennis Australia in time for a potential semi-final against the winner of Great Britain and France.

"Personally, I'd like to think that issues can be resolved," Masur said.

"I've got to say from that press conference it was hard to ascertain all those issues. If the gripes they have, maybe they have to be presented to Tennis Australia. I'd like to think that ultimately they can be resolved.

"We're a pretty small tennis fraternity. Bernie's a significant player and he's only going to get better. But it's got to get to a much better point than it is obviously."

Masur, who backed Tennis Australia's stand against Tomic, also threw his support behind performance director Pat Rafter.

Tomic directed much of his tirade towards the former grand slam champion, calling him a 'good actor' and a 'mask'.

"I really endorse Pat Rafter for his role as performance director," Masur said.

"It's pretty obvious, you look at the hierarchy, I report to Pat, Pat reports to (CEO) Craig (Tiley), Craig reports to (chairman) Steve (Healy). Unfortunately those accusations were made at three senior figures that stand above me. Ultimately I'm a company man and we've got to do what is right for the company and what is right for tennis.

"We have a lot of money invested in junior development. We have all the national academies around Australia. I think ultimately the board and management had to do it."

Kokkinakis said he wasn't worried about the ramifications of Tomic's axing, confident the team will regroup in time for the quarter final.

"The morale will be fine when we get there," Kokkinakis said.

"Obviously we wanted the strongest team possible going into it. Bernie has been so good for us in Davis Cup, but obviously he's got some personal issues going on with them. I get along with all the guys there and I was hoping he could obviously play. But I think we still have got a strong team and good enough to get it done.

"[I've spoken to Bernie] a little bit. It's tough. He's got some things he needs to deal with with them. I think it's more between him and TA. I don't really know too much the ins and outs about it. I'm just staying out of it but I know I'll put my hand up if I need to play."