Celtic manager Ronny Deila was delighted after his 10 men dug deep to beat Aberdeen 2-1 at Pittodrie.
Defender Virgil van Dijk (inset) tucked away a late winner after the Hoops had lost captain Scott Brown to a red card. Stefan Johansen had earlier drawn them level after Adam Rooney put Aberdeen ahead.
Speaking afterwards, Deila described the result as "unbelievable".
He added: "I'm so proud of the boys who travelled to Romania, coming back and playing another game, it was not a long period.
"To get something out of the game was fantastic, and the way we did it as well.
"When you talk about togetherness and team spirit, that's what we mean and there were a lot of leaders out there."
The win took Celtic back to the top of the Scottish Premiership and Deila said: "That's where we want to be. It's a very important win."
The Norwegian had no criticism of referee Alan Muir's decision to send off Brown for a second bookable offence.
He said: "It's hard to say, it could be okay. I think the referee was okay today, it's hard to be a ref but it's fair enough with the sending-off."
Aberdeen full-back Shay Logan was sent off for foul and abusive language after the final whistle.
Logan was under the spotlight before the game after Celtic appealed against winger Aleksandar Tonev's seven-match Scottish FA ban for using offensive language of a "racist nature" towards the Dons defender during the teams' last meeting.