Rangers delivered a dominant performance on Sunday, securing a resounding victory over Celtic in the Premier Sports Cup quarter-final and exposing managerial struggles for Celtic's Martin O'Neill. The comprehensive defeat marked a stark contrast to O'Neill's unbeaten record in Old Firm derbies during his previous tenure, signaling a significant reality check for his returning side.

Derek McInnes' Rangers played with an energy and aggression that Celtic could not match, marking what was described as the best performance of McInnes' era. The home crowd at Ibrox was energized by the dominance on display, a stark contrast to the opposing dugout where O'Neill's team appeared outmatched. "Celtic's soft underbelly had been brutally exposed," one analysis noted, suggesting the team struggled with the pace and pressing of Rangers.

kritik was leveled at several Celtic new signings. Goalkeeper Sam Johnstone, preferred over Viljami Sinisalo, was described as unconvincing, flapping at crosses and making slack passes. Striker Kasper Hogh, a reported £11 million signing, offered no discernible threat. Midfielder Mika Baur was perceived as ineffective, and Sebastian Tounekti was substituted at halftime, emblematic of Celtic's overall performance. The team's defense was also highlighted as a point of concern, with recurring issues of being overly open and fragile even in previous matches against lesser opponents.

The loss follows Celtic's Champions League exit, where they were also defeated by LASK Linz. The aggregate scoreline in their two most significant matches this season stands at 8-1 against them, leading to concerns that the team may be prone to crumbling under pressure.

In contrast, Rangers' Dan Neil was highlighted as the standout player, scoring two goals and displaying significant leadership. Neil's performance was seen as dispelling any doubts about his impact since his summer move from Sunderland, dominating Celtic's Callum McGregor in midfield. Ryan Naderi was also credited for his energy and industry, particularly for his role in initiating the move that led to Neil's opening goal.

Celtic faces Ferencvaros in the Europa League on Thursday before another league match against Rangers next Sunday. The recent defeat has placed significant pressure on O'Neill and his squad, with the team having limited time to adapt and address their vulnerabilities before their next encounter.