Ronny Deila declared his treble dream was "still alive" after Celtic's 2-0 Scottish League Cup final win over 10-man Dundee United at Hampden Park.
Goals from Kris Commons and James Forrest gave the Norwegian boss his first trophy since taking over from Neil Lennon last summer.
United skipper Sean Dillon was sent off in the 56th minute after a reckless challenge on Celtic defender Emilio Izaguirre, and Forrest had a late penalty saved by goalkeeper Radoslaw Cierzniak.
The Scottish Premiership leaders take on United in their William Hill Scottish Cup quarter-final replay at Parkhead on Wednesday night and then again in the league at the weekend, and Deila will turn his attention to those two competitions.
The Celtic manager said: " We have talked about this (treble) many times. It is a dream.
"It is so tough to do it but it is possible. The dream is still alive and I am happy.
"Now we have one trophy and on Wednesday we have to be back again to make another cup, so it is going quick in this job.
"It is a great feeling. It is good to get a good start when you are a manager at a big club like Celtic. This was the first trophy we could win and we did it. You get the appetite and you want more.
"I am proud of the boys. I think we did a professional job so we should really enjoy this moment."
Deila, though, was far from enamoured by the antics of substitute John Guidetti who replaced Leigh Griffiths after 69 minutes, when Forrest also came on for Commons.
The on-loan Manchester City striker lost the battle with Forrest for the penalty after the winger was brought down in the box by United Paul Dixon, and appeared to go into an angry huff.
Former Stromsgodset boss Deila said: "Both of the players who would have taken the penalty were off, Leigh and Kris. It looks like it was first to the ball.
"I don't like that they argued about that. It was stupid. It is not the team spirit I want."
United boss Jackie McNamara thought his side should have got a penalty in the first half when, with Celtic leading 1-0 through Commons' 28th-minute strike, Ryan Dow went down in the box under a challenge from Hoops skipper Scott Brown.
Asked if referee Bobby Madden should have pointed to the spot, former Celtic defender McNamara said: "Yes. I'd like to see it again.
"He was very slow to make a decision - or not make a decision - whereas with their one he was very quick off the mark to point to the spot."
Deila disagreed, saying: "No. It was hard to see but I have been told it is a good decision. I think the referee was good."
Dillon was off the pitch getting "several" stitches inserted in a gashed leg following a challenge with Celtic defender Virgil van Dijk when Commons fired the Glasgow side ahead.
Irishman Dillon was about to be replaced by Blair Spittal when he ran out of the tunnel and re-joined the action.
McNamara said: "I was about to make the change. It seemed to be taking too long and it proved costly at that point for us.
"I'm proud of the players, the way they responded. I thought a lot of things went against us but we stuck to our task right to the end despite the disappointments.
"Certain things didn't go for us but I can't fault the lads for effort and commitment."
After having two players sent off in the 1-1 Scottish Cup clash with the Hoops last weekend, McNamara concedes he will have to keep 11 men on the pitch in the replay.
McNamara said: "We defended well with 11 men and with 10 men and last week with nine. So hopefully on Wednesday we keep 11 on. It is imperative we do."