Celtic manager Martin O’Neill did not hide his frustration after his side suffered a painful 2–1 defeat to Celta Vigo in the UEFA Europa League, with two controversial refereeing decisions leaving the Hoops boss questioning the official’s performance.

Celtic looked to be in a promising position after Mika Baur put them ahead shortly after half-time at Celtic Park. However, their advantage disappeared when Javi Rodríguez scored twice in the space of three minutes, handing the Spanish visitors a comeback victory and leaving Celtic without a point after their opening three Europa League matches.

While O’Neill accepted that Celtic had opportunities to take control of the contest, he was particularly unhappy with a decision in the build-up to Celta Vigo’s equaliser. He also questioned why his team had not been awarded a foul after Callum Osmand went down under pressure during the first half.

For Celtic supporters, the defeat was frustrating on several levels. The team had shown enough to believe a positive result was possible, but another disappointing European night exposed the fine margins separating a competitive performance from a damaging defeat.

MARTIN O’NEILL QUESTIONS THE REFEREE’S DECISIONS

O’Neill’s strongest criticism concerned the free-kick that led to Celta Vigo’s equaliser.

The Celtic manager believed his team should have been awarded a foul on Camilo Durán moments before the referee gave the visitors a free-kick. Celta capitalised on the resulting set piece, with Rodríguez heading home to make it 1–1.

Speaking after the match, O’Neill said: “We conceded a free-kick and I thought a second before that we should have had a foul for us.”

The manager felt that the decision affected Celtic’s momentum at a critical point in the match. Instead of protecting their lead, the Hoops suddenly found themselves under pressure, and Celta took advantage.

O’Neill was booked for protesting the decision, underlining just how frustrated he was with the sequence of events.

However, it is important to distinguish between the manager’s assessment and an independently established refereeing error. O’Neill clearly believed Celtic had been treated unfairly, but his comments alone do not establish that the official deliberately favoured the opposition.

CALLUM OSMAND INCIDENT ADDS TO CELTIC’S FRUSTRATION

The disputed free-kick was not the only incident that left O’Neill unhappy.

During the first half, Celtic supporters appealed for a foul after Callum Osmand went down following contact from Celta defender Javi Rueda. The incident occurred near the edge of the penalty area, and the referee allowed play to continue.

O’Neill believed the contact warranted a foul and questioned the subsequent VAR check.

“I don’t know what they’re checking because for me that’s a very obvious foul,” he said when discussing the Osmand incident.

For Celtic, the frustration was understandable. A free-kick in a dangerous position could have offered an opportunity to score before the interval, potentially changing the complexion of the match.

Nevertheless, Celtic cannot know whether the decision would ultimately have produced a goal. The incident will remain a talking point among supporters, but the team must also examine the chances it created and the goals it conceded.

CELTIC HAD A CHANCE TO TAKE CONTROL

Although the refereeing decisions dominated much of the post-match discussion, Celtic also had a significant opportunity to put the game beyond Celta Vigo.

Baur gave the hosts the lead in the 47th minute after Haissem Hassan drove forward and delivered the ball into the penalty area. The loose ball fell to Baur, who finished to put Celtic 1–0 ahead.

Celtic then came close to doubling their advantage when Liam Scales sent a header against the crossbar.

O’Neill believed that a second goal would probably have secured the victory.

“If Scales’ header goes in to make it 2-0, we get the three points,” he explained.

That missed opportunity proved costly. Instead of forcing Celta to chase the match, Celtic left the door open for their opponents to recover.

The lesson is clear: when facing technically strong European opposition, Celtic need to make their best periods count. Taking the lead is important, but converting opportunities to establish a two-goal cushion can be decisive.

CELTA VIGO PUNISH CELTIC IN THREE MINUTES

Celta Vigo demonstrated precisely why Celtic could not afford to lose concentration.

Rodríguez equalised in the 68th minute, heading home from a free-kick. Just three minutes later, he struck again with a powerful effort from outside the penalty area to put the visitors in front.

Two goals in such a short period transformed the contest.

Celtic had been leading and looked capable of securing a valuable result. Suddenly, they were chasing the game, with Celta Vigo able to defend their advantage and manage the closing stages.

The visitors also enjoyed more possession and produced significantly more attempts at goal, according to Celtic’s official match report. That suggests the Spanish side had attacking threats beyond the two goals that ultimately decided the contest.

Celtic can reasonably argue that certain decisions went against them. But the defensive response to Celta’s equaliser is another area that requires attention.

Conceding once from a set piece is disappointing. Allowing the opposition to score again almost immediately makes the situation considerably worse.

EUROPEAN FORM IS BECOMING A SERIOUS CONCERN

The defeat was particularly damaging because it followed losses to Ferencváros and Benfica in Celtic’s opening Europa League fixtures.

After three matches, Celtic had no points in the league phase, leaving their hopes of progressing under considerable pressure. Five fixtures remained, meaning qualification was still mathematically possible, but the margin for error had become much smaller.

O’Neill remained determined not to abandon hope, insisting that Celtic needed to find a way to win European matches.

That message matters because Celtic cannot allow frustration over one match to become an excuse for a wider run of disappointing results.

Their domestic performance against Hearts had demonstrated their attacking potential, but European football presents a different challenge. Opponents can punish lapses in concentration quickly, and Celtic must find ways to maintain control when momentum shifts.

The upcoming European fixtures will therefore test more than the team’s attacking quality. They will reveal whether Celtic can manage pressure, defend leads and respond effectively after conceding.

SHOULD CELTIC FOCUS ON THE REFEREE OR THEIR OWN MISTAKES?

This is the difficult question facing O’Neill and his players.

Supporters have legitimate reasons to debate the two incidents highlighted by their manager. Refereeing decisions can have a major influence on close matches, especially when a disputed free-kick directly precedes an equaliser.

However, focusing exclusively on the official risks overlooking the opportunities Celtic failed to convert and the defensive lapse that followed the first Celta goal.

Scales’ header hitting the crossbar was a major turning point, but it was not a goal. Celtic still needed to protect their advantage, and the rapid concession of two goals demonstrated how quickly the situation could unravel.

The strongest response would be for Celtic to review the disputed decisions while also addressing their own shortcomings.

O’Neill’s frustration may reflect the emotions of a manager who believed his team could win. But the next step must be turning that frustration into improvements on the pitch.

WHAT HAPPENS NEXT FOR MARTIN O’NEILL AND CELTIC?

Celtic now need to respond quickly, beginning with their domestic commitments before turning their attention back to Europe.

O’Neill has publicly backed his players’ effort, and there is a difference between questioning commitment and demanding better decision-making in crucial moments. Celtic can compete more effectively if they become more clinical in front of goal and more disciplined when defending a lead.

The manager must also ensure that the controversy surrounding the Celta Vigo match does not become a distraction from the wider European challenge.

Celtic’s remaining fixtures offer opportunities to recover points, but victories will be essential. A strong domestic performance can restore confidence, although it will not automatically solve the tactical and defensive problems that have emerged in Europe.

For supporters, the immediate concern is whether this defeat becomes another setback in a difficult continental campaign or the moment that forces the team to respond with greater urgency.

FINAL VERDICT: CELTIC HAVE REASONS TO BE FRUSTRATED, BUT MUST RESPOND

Martin O’Neill was clearly unhappy with the officiating after Celtic’s 2–1 defeat to Celta Vigo, particularly over the alleged foul on Camilo Durán before the Spanish side’s equaliser and the earlier incident involving Callum Osmand.

Those decisions will continue to attract debate among Celtic supporters. Yet the result also highlighted the importance of taking chances and maintaining defensive concentration when leading against strong European opposition.

Celtic had the advantage, and Scales came close to making it 2–0. Instead, Rodríguez scored twice in three minutes to complete Celta Vigo’s comeback.

O’Neill’s challenge is now to ensure that disappointment becomes motivation rather than a distraction. Celtic’s European campaign remains difficult, and their response in the remaining matches will determine whether they can revive their hopes of progressing.

The referee may remain a major talking point, but Celtic’s next performance will ultimately matter far more than the post-match arguments.