Make no mistake. A first trophy as Celtic manager was a huge, significant step for Ronny Deila. He took the old cup from Rod Stewart, skipped down the Hampden steps and refused to let go until the ‘Ronny Roar’ — his ceremonial bonding session with the club’s supporters. But this was a day when sobriety was the Parkhead watchword. Sober reflection, followed by a sober celebration. Celtic’s first League Cup since 2009 is the platform for Deila to become only the third Celtic boss to win a domestic Treble. But that’s it. A piece in the jigsaw, no more. The Celtic players celebrate on the podium with the QTS Scottish League Cup after beating Dundee United 2-0 at Hampden Park . Celtic manager Ronny Deila gets ready to lift the Scottish League Cup with his players as The Bhoys kicked off their celebrations . A Scottish Cup replay against Dundee United — who else? — beckons on Wednesday and that ensured there was no prospect of Glasgow’s fast-food outlets cashing in on a Celtic team session last night. The players, captain Scott Brown included, were under orders to be in bed by midnight. ‘We should enjoy the moment,’ said a relieved Deila after an eventful, if unremarkable, final. ‘But there is not going to be any nightlife.’ We should have known Brown would be a key figure here again. The Celtic skipper escaped punishment for the tackle which triggered two red cards – both rescinded – when these teams met at Tannadice last week. His manager then overlooked the front-page pictures of a night of rabble-rousing in Edinburgh before the final. Yet the greatest let-off of all might have been here when referee Bobby Madden denied United – who ended the game with 10 men and a strong sense of injustice - a penalty kick. Popstar and devoted Celtic fan Rod Stewart hands Celtic captain Scott Brown the trophy after the 2-0 victory over Dundee United . Scott Brown lifts the Scottish League Cup alongside keeper Craig Gordon (right) after a difficult week in the headlines . Celtic captain Scott Brown takes a selfie with a unusual phone case in hand as he captures the moment at Hampden Park . Kris Commons (left), who scored Celtic's first after 28 minutes, poses with the Scottish League Cup trophy on Sunday . Dundee United (4-3-2-1): Cierzniak 7; Dillon 6, Morris 6, Fojut 6, Dixon 5; Paton 6 (Erskine 72), Butcher 6, Rankin 6; McGowan 6, Dow 6; Bilate 6(Anier 59) Subs not used: Szromnik, Souttar, Telfer, Connolly, Spittal . Booked: McGowan . Sent off: Dillon . Celtic (4-2-3-1): Gordon 6; Ambrose 7, Van Dijk 7, Denayer 7, Izaguirre 7, Bitton 8 (Henderson 81), Brown 7; Stokes 7, Johansen 7, Commons 7 (Forrest 67); Griffiths 7 (Guidetti 67). Subs not used: Zaluska, Scepovic, Fisher, McGregor. Goals: Commons 28, Forrest 79 . Referee: Bobby Madden . Attendance: 49,259 . MOTM: Nir Bitton. Celtic were ahead at the time. They had exploited their opponents being down to 10 men when skipper Sean Dillon collided with Virgil van Dijk and left the pitch in 23 minutes to receive stitches. He was gone for fully eight minutes. ‘I was about to make a change because it seemed to be taking too long,’ said manager Jackie McNamara afterwards. ‘It proved costly for us. ‘I had Blair Spittal ready to come on and I was going to put Ryan McGowan to right-back. Unfortunately, I don’t have a magic wand for those circumstances.’ Dillon would eventually leave the pitch on a permanent basis in the second half for a reckless challenge on Emilio Izaguirre in 56 minutes. Thereafter, Celtic dominated, scoring again through James Forrest and emphasising why the Tayside club were so willing to wait for their captain when he left the pitch for lengthy treatment. He wasn’t to blame for the insipid Paul Dixon free-kick which allowed Craig Gordon to gather and trigger a Celtic counter. But it was from his position that Anthony Stokes – who had a fine game - chipped a left-foot cross that was prodded towards goal by Kris Commons, changing direction as it came off the inner thigh of Jaroslaw Fojut. Somehow Rado Cierzniak in the United goal clawed it brilliantly on to the post, but Commons would not be denied, thumping the rebound emphatically into the net with his right foot for 1-0. ‘Hindsight is a wonderful thing,’ pondered McNamara. ‘If we had scored from that Dixon free-kick, everyone would be saying it was a great decision not to substitute him and give him a little more time.’ There was more cause for United regret in 36 minutes when Ryan Dow, chasing a through ball into the area was pushed in the back by Brown, a villainous figure through Tannadice eyes. Referee Madden had a good, long look then decided to turn the other way. Brown had ducked SFA punishment last weekend and here was the cause of another Tannadice gripe against authority. Not without justification, it should be said. James Forrest curls in the second goal for Ronny Deila's side as the Scottish Premiership leaders proved their superiority at Hampden Park . John Guidetti (left), on loan from Manchester City, celebrates Forrest's strike for The Hoops as they beat Dundee United . Celtic manager Ronny Deila urges his side to remain focused as they continue to chase a domestic treble . Forrest roars in celebration with the Celtic fans at Hampden Park erupting after Deila's team prevailed 2-0 in the Scottish League Cup final . Predictably, Deila – perhaps seeing it through green and white shades – saw things differently. ‘It was hard to say, but, from what I have been told, it was a good decision,’ he claimed. ‘I think the referee was very good. We are after him whenever he does something wrong, but you have to give them credit when they do a good job.’ In contrast, United foamed with frustration and knew they were done for when they went down to 10 men in 56 minutes. Last Sunday, Paul Paton and Dixon were sent packing. Paton’s proved to be a nonsense, but Dillon’s here was inarguable. The defender lunged into a dangerous challenge on Izaguirre. The Honduran was fortunate to escape serious injury. On the United touchline McNamara raged with the perceived injustice of it all. His side had lost the Scottish Cup Final against St Johnstone last May and they knew, now, another showpiece occasion was slipping away. Celtic’s extra man was telling. Dundee United captain Sean Dillon (right) is sent off for this late challenge on Celtic defender Emilio Izaguirre . Dillon can't hide his devastation after the Dundee United captain was sent for an early shower having been sent off at Hampden Park . In Stokes, Stefan Johansen and Nir Bitton, they had the best players on the pitch. In 67 minutes, Johansen got across Fojut to jab a Leigh Griffiths cross towards goal, the ball shaving the post en route to a narrow United escape. It was the last act for Griffiths before he made way for John Guidetti. James Forrest replaced the tiring Commons and the substitutes would make quite an impact. Forrest and Guidetti started brightly enough, the winger sweeping the critical second goal into the net from 16 yards in 78 minutes after the Swede teed up a Johansen cut-back. Their manager was less impressed with the very public falling out as the two haggled over a penalty kick five minutes from time. Kris Commons managed to fire Celtic ahead from an acute angle during the first-half, as Deila (right) roars in celebration . Commons put The Bhoys ahead on the half hour mark with his 11th goal of the season in all competitions with Celtic . Commons is congratulated by his team-mates having put the Scottish Premiership leaders in front during the League Cup final . Referee Madden showed no hesitation when Forrest was pulled back by Dixon. ‘He was very quick to point to the spot that time,’ said a caustic McNamara afterwards. Forrest grabbed the ball, resisting Guidetti’s determined and very vocal efforts to do the same. The winger placed the ball down, then placed a weak effort too close to Cierzniak, the United keeper preventing a third goal. An unimpressed Deila explained afterwards: ‘Both of the players who were going to take a penalty, Leigh Griffiths and Kris Commons, were off the park. It looks like it was the first to the ball, but I don’t like that they argue about that. Forrest earned Celtic a penalty late on under this challenge from Dundee United's Paul Dixon in the closing stages . Several Celtic players wanted Guidetti to take the spot-kick but Forrest insisted and eventually missed his penalty . ‘It is stupid. That is not the team spirit I want.’ As the final whistle signalled a significant day for the Norwegian, Guidetti marched straight down the tunnel in a huff, clearly furious. He was retrieved by Mikael Lustig, possibly on Deila’s orders. ‘There is a lot of emotion in these situations and strikers, especially, want to score goals,’ he continued. ‘Again, we have to put the team in front of ourselves. It is something we have work on all the time and learn from through experience. This is not team spirit. It is individual thinking - and I don’t want anything to do with that.’ Collectively, Celtic have much to excite them. A Treble hovers on the horizon. The late night celebrations can wait. Keeper Craig Gordon gets the drinks flowing in the dressing room and sprays champagne at his team-mates . Celtic goalkeeper Craig Gordon poses with the Scottish League Cup trophy in the winning changing room . Celtic boss Eonny Deila enters the dressing room with a smile on his face after the The Bhoys won the Scottish League Cup final . Goalscorers James Forrest (left) and Kris Commons (right) pose with the Scottish League Cup final trophy in front of the fans . After a testing week in the headlines for the Celtic captain, Scott Brown holds up the trophy in front of the adoring fans . Deila hopes to become the third Celtic manager to achieve a domestic treble with The Bhoys, having won the League Cup on Sunday .
Ronny Deila's Celtic side won their 15th Scottish League Cup as Kris Commons and James Forrest scored . Dundee United captain Sean Dillon sent off after the break for a late challenge on Celtic defender Emilio Izaguirre . Celtic are leading the Scottish Premiership and have a Scottish Cup quarter-final replay with Dundee United .