St Johnstone boss Steve Lomas was disconsolate after seeing substitute David Robertson suffer a suspected broken leg in the 1-0 Clydesdale Bank Premier League loss to Hibernian at McDiarmid Park.
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Saints had arguably the better of the opening 79 minutes before the game burst into life when Hibs conceded a penalty, which substitute Nigel Hasselbaink saw saved by goalkeeper Ben Williams.
Lomas was sent to the stand by referee Craig Thomson soon afterwards and Paul Cairney added to his woes by netting what proved to be the winner after 82 minutes.
Midfielder Robertson was taken off on a stretcher and Saints captain Dave Mackay was shown a straight red card for an altercation with Leigh Griffiths in stoppage time as the hosts' misery was complete.
Lomas said: "It's been a disappointing night, especially with Davie Robertson getting that bad injury. Fingers crossed it's not as bad as we think.
"It looked like a block tackle and it looks like he's come off second best. Very disappointing for the lad and for us."
Lomas' dismissal from the touchline came after Hasselbaink took the spot-kick following David Wotherspoon's trip on Mackay.
"I kicked a water bottle," Lomas added.
"It was frustration. I said to the fourth official he could've used a bit of common-sense.
"It's frustrating, you've missed a penalty, not your regular penalty taker. I was a bit perplexed why he (Hasselbaink) was taking it. Dave Mackay's normally our penalty taker.
"It should've been one of the senior boys taking it, but in the heat of the game he fancied it. We can't criticise him for stepping up."
Mackay was sent off late on after Griffiths chased down the ball which had been returned to Saints following Robertson's injury.
Lomas added: "Dave suggested that Leigh came and put the head to him. It was a lock of heads and he (Thomson) just chose to send Dave off.
"If Dave has (motioned his head) it's stupid."
Mackay's dismissal adds to Saints' defensive woes, with Callum Davidson missing the match with a groin problem.
For Hibs victory came as welcome relief following successive losses to Dundee and Aberdeen and ahead of the Edinburgh derby with Hearts in the William Hill Scottish Cup fourth round on Sunday.
"It's a big three points for us," Hibs boss Pat Fenlon said.
Not only did Williams save Hasselbaink's spot-kick, but also the rebound from Liam Craig.
Fenlon added: "The penalty save was a good save, but I think the follow up was a better one. He's been a really good signing and he's made some terrific stops.
"We were under the cosh a bit, they had a fair few corners which we defended quite well.
"Ben saving the penalty gave our players a lift and maybe deflates them a little bit.
"It happens a lot in football, you save a penalty go up the pitch and the other team score. I was delighted it was us tonight."
Fenlon was also pleased with Cairney netting the winner.
"He's been terrific all season," the Hibs boss added.
"He didn't play well tonight, but he scored a goal. He was due a goal."