Why Celtic Lost 5-1 to LASK: The Tactical Reasons Behind Celtic Historic Collapse

Celtic’s 5-1 defeat to LASK was not simply a case of one bad defensive error or an unfortunate night in front of goal.

The collapse developed through a combination of passive game management, poor defensive transitions, weak control of midfield, individual mistakes and an inability to respond once LASK gained momentum.

Celtic had every tactical advantage before the match. They carried a 3-0 first-leg lead and extended that advantage to 4-0 when Callum McGregor scored in the 21st minute. Yet instead of using that position to control the tempo and force LASK to chase the game, Celtic gradually surrendered control. LASK eventually won 5-1 after extra time and progressed 5-4 on aggregate.

1. Celtic became too passive after taking control

The biggest problem was psychological, but it manifested itself tactically.

Once McGregor made it 1-0, Celtic effectively had a four-goal aggregate cushion. That should have allowed them to play with composure, circulate possession and attack the spaces LASK were inevitably going to leave behind.

Instead, Celtic increasingly allowed the Austrians to dictate the intensity.

McGregor himself admitted afterwards that Celtic were “passive all night” and looked afraid to go and win the game. That assessment is important because it explains why the scoreline became so extreme.

Celtic were not necessarily required to attack recklessly. The better approach would have been controlled aggression: keep the ball, make LASK defend, and launch attacks whenever their wing-backs pushed forward.

They failed to do that consistently.

2. LASK’s 3-5-2 created problems between Celtic’s midfield and defence

LASK started with a 3-5-2, giving them two forwards capable of occupying Celtic’s centre-backs while their wing-backs provided width. Celtic’s starting shape was a 4-2-3-1.

That created an important tactical battle.

LASK’s two strikers could occupy Cameron Carter-Vickers and Auston Trusty, while midfielders such as Robert Ljubicic and Sascha Horvath could push beyond Celtic’s midfield line.

When Celtic’s wide players failed to track runners consistently, LASK could create situations where their wing-backs or midfielders received the ball facing forward.

That became increasingly dangerous because Celtic’s midfield two of McGregor and Mika Baur had large areas to protect.

Once LASK increased the tempo, Celtic were no longer consistently controlling the space in front of their centre-backs.

3. The equaliser was the turning point — and Celtic gifted it to LASK

Celtic’s first major tactical failure produced the 1-1 goal.

Benjamin Nygren attempted to play the ball back but put it into an extremely dangerous area. Moses Usor pounced, found himself in behind the Celtic defence and finished. Sky Sports described the goal as Celtic being punished for “complacent play at the back.”

This goal was particularly damaging because it gave LASK belief.

Before the equaliser, Celtic could have been looking at a situation where LASK needed four goals merely to force extra time. After the mistake, the hosts suddenly had evidence that Celtic could be vulnerable.

LASK’s mentality changed immediately.

4. Celtic failed to stop LASK’s momentum after half-time

The second-half start was arguably the most damaging tactical period of the entire match.

LASK scored through Ljubicic just three minutes after the restart, with a low strike from around 20 metres. Ten minutes later, Adeniran scored again from outside the box following a fast break.

This tells us Celtic had failed to solve the central problem at half-time.

O’Neill later acknowledged that LASK scored soon after the restart and that momentum swung heavily in their direction.

At 1-1, Celtic needed to make the game slower and regain territorial control.

Instead, LASK were allowed to attack repeatedly.

That is the key tactical difference between defending a lead and controlling a match. Celtic were defending the aggregate score rather than controlling the football.

5. Celtic’s midfield stopped giving the defence enough protection

The midfield battle gradually moved towards LASK.

McGregor remained important, but Celtic needed sustained support around him. Baur was eventually replaced by Luke McCowan in the 71st minute, while Reo Hatate replaced Nygren in the 63rd.

The problem was that Celtic were increasingly playing without the ball in dangerous areas.

When LASK attacked through Horvath, Ljubicic and their wing-backs, Celtic’s midfield had to continually drop towards the defence. That created a disconnect between the midfield and the forward players.

Consequently, Celtic struggled to retain the ball after winning it.

That meant another LASK attack was often only seconds away.

6. Celtic’s transition defence was exposed repeatedly

This was arguably the clearest tactical weakness.

LASK’s third goal came from a fast break, with Horvath supplying Adeniran, who produced an excellent finish from outside the area.

Celtic were therefore vulnerable in the exact situation they should have been trying to avoid: losing possession while LASK had numbers moving forward.

The solution should have been to establish a better rest-defence structure — essentially leaving enough players behind the ball to deal with LASK’s two forwards and midfield runners whenever Celtic attacked.

Instead, Celtic often had large spaces between their midfield and defensive lines.

Once LASK won possession, they could attack those spaces quickly.

7. Celtic stopped threatening LASK’s goal

This is an underrated part of the collapse.

Celtic did have opportunities. O’Neill was correct when he said afterwards that his team should have been out of sight by half-time. Celtic had chances early in the match, including opportunities for Kasper Høgh and Mika Baur.

But after LASK gained momentum, Celtic stopped making their possession dangerous.

That was crucial.

If Celtic had continued creating high-quality attacks, LASK would have been forced to keep worrying about conceding another goal. Instead, LASK increasingly committed players forward because they sensed Celtic were no longer hurting them.

The final statistics underline that shift: LASK registered eight shots on target compared with Celtic’s three, despite possession being relatively even at 49%-51%.

Possession therefore did not equal control.

LASK were doing much more with their possession and attacking territory.

8. Celtic’s inability to defend repeated crosses and set-piece situations became critical

As the match progressed, LASK repeatedly got the ball into Celtic’s penalty area.

The warning signs were there before the equaliser.

LASK had several chances around the box, including an effort that hit the bar, while their late pressure produced a succession of crosses, corners and second balls.

The fourth goal demonstrated the problem perfectly.

LASK kept the pressure on, Celtic failed to properly clear the danger and Florian Flecker eventually headed home from close range in the 90th minute to make it 4-1 and level the aggregate score.

That goal was not simply bad luck. It was the consequence of sustained territorial pressure and poor box management.

Celtic were defending too close to their own goal and repeatedly allowing LASK to recycle attacks.

9. Celtic’s substitutions were reactive rather than transformational

O’Neill made changes, bringing on Hatate and Sebastian Tounekti in the 63rd minute before introducing McCowan and Liam Scales eight minutes later.

The substitutions were understandable, but by then LASK were already leading 3-1.

The bigger issue was that Celtic’s changes did not fundamentally alter the game’s tactical pattern.

They needed either:

• more control in midfield;
• a reliable outlet to hold the ball up;
• greater pace in transition; or
• a way of preventing LASK from repeatedly attacking down the flanks.

Instead, Celtic largely remained in survival mode.

When a team is under sustained pressure, simply replacing one midfielder or winger is not always enough. The structure has to change.

10. LASK became physically and mentally stronger as the match went on

This was another decisive factor.

LASK’s own manager Didi Kühbauer said his team felt physically stronger in extra time, while the club’s match report described the side as continuing to attack with enormous energy after the 3-1 goal.

That was reflected in the final stages.

Even after the aggregate score was levelled, LASK continued attacking.

Celtic, by contrast, looked increasingly desperate.

The extra-time winner came when Krystof Danek fed Adeniran, who had enough space to strike from around 25 metres and put LASK ahead on aggregate.

That was the ultimate consequence of Celtic never truly regaining control.

The tactical chain that explains the 5-1

The collapse can therefore be understood as a chain reaction:

4-0 aggregate lead → passive approach → defensive mistake → LASK belief → poor second-half control → midfield stretched → transition problems → repeated box pressure → failure to create attacking relief → late equaliser → extra-time fatigue → LASK winner.

The 5-1 scoreline was therefore not caused by one isolated mistake.

It was the product of Celtic losing control of the game’s rhythm.

The biggest lesson for Celtic

The central mistake was confusing an aggregate advantage with match control.

Celtic did not need to dominate possession for 90 minutes or attack constantly. They needed to make LASK feel that every forward movement carried a risk.

Instead, once LASK scored, Celtic increasingly became reactive.

The most damaging statistic is perhaps not the five goals conceded but the fact that LASK were allowed to generate eight shots on target to Celtic’s three.

A team four goals ahead on aggregate should be making the opponent increasingly frustrated. Celtic did the opposite: they allowed LASK to become increasingly confident.

That is why McGregor’s post-match assessment that Celtic “got what we deserved” is so revealing.

In tactical terms, Celtic lost because they stopped controlling the game and started merely protecting the scoreline. Once LASK realised that, the Austrian side had the space, momentum, physical intensity and attacking freedom to turn an almost impossible deficit into one of the most remarkable comebacks in Champions League qualifying history.