Giants coach Leon Cameron concedes Richmond should've won Saturday night's three-point thriller at Spotless Stadium, where a last-minute Jeremy Cameron goal broke Tiger hearts once again.

Cameron converted on the run from 50m out after a booming Nathan Wilson kick in, which followed a recalled Shai Bolton behind that originally looked like the winning goal for the visiting Tigers.

Bolton's snap was called a goal but a late review showed debutant Harry Perryman managed to get a finger on the ball to save the Giants.

Moments later Cameron goaled to put the home side in front for the only time in the match, before 10,677 delirious fans at Spotless Stadium.

Richmond led by 31 points at the first break, won the inside 50s count, had more contested possessions and more scoring shots across the four quarters but had their hearts broken late on.

"We didn't play well, that's the first thing, the second thing is Richmond should've won the game," coach Cameron said.

"They were far better than us throughout the night and they're playing some great footy.

"It's a ruthless game. We sit here and celebrate. We were in front for a minute out of 120, it's a ruthless game.

"We've got a good steely resolve, which is pleasing. It's very hard to train that resolve, realising that you're never out of a game.

"Richmond were the better side on the night but coming back to that resolve amongst the playing group, when things aren't working a number of players that probably didn't produce their best footy tonight found a way.

"You can't do that all the time because you're just going to get caught out."

Just a week ago Steve Johnson was the hero, booting GWS in front at the death to beat Collingwood.

This time it was Cameron, finishing off a stirring fourth-quarter comeback where the Giants kicked five goals to nothing as Richmond failed to close out a fourth-quarter lead for the third-straight week.

Last weekend David Mundy kicked truly after the siren as Fremantle beat the Tigers, while it was the Western Bulldogs a week earlier who prevailed in a tight one against Richmond.

"It's tough, it's heart breaking to be honest," Tigers coach Damien Hardwick said.

"Our players gave great intent, great effort, we just couldn't close out the game. We had 60 inside 50s, win contested ball, win forward half turnovers, win the pressure, just didn't get the result.

"We've got young players playing up there doing their absolute best. I thought they battled as hard as they could for as long as they could, just probably fell out of range towards the end.

"We've lost to the Bulldogs by a kick, we've lost to GWS by a kick. I walk away as a coach incredibly proud of our boys.

"I look at them, I think they've taken it up to every side they've played, we had that one bad game verse Adelaide.

"I walk away really disappointed, we should've won there's no doubt about that, but I thought the intensity and effort our guys gave was really high."

Rory Lobb failed to finish the game after coming off with a groin injury during the third quarter, and Cameron said the towering forward would be monitored closely during the week ahead of next Sunday's clash with West Coast in Perth.

The Giants will still be without at least six regular starters who remain stuck in the swollen casualty ward, including vice captain Stephen Coniglio, defenders Nick Haynes and Adam Kennedy, and the latest addition, Devon Smith.

"It probably summed us up yesterday when you're having a captain's run and losing Devon Smith on a captain's run it's just really unheard of," Cameron said.

"He goes in Monday and gets operated on and it's going to range from six to 12 weeks. It's one of those things at the moment and we've got to deal with it.

"Matt de Boer came in and plays his role, Daniel Lloyd, Sam Reid, Harry Perryman, these sort of guys. They're having little moments throughout games that are helping us win.

"We've just got to keep putting the 22 players out there each week regardless of where they come from, whether they're drafted, whether they're a rookie whatever.

"That's the good thing about the team at the moment, that the 22 that run out have got to play some good hard footy. That was pleasing in the last quarter tonight."