The atmosphere is electric at Celtic Park as Martin O'Neill describes his side as "buoyant" ahead of Sunday's must-win Old Firm clash against a "spooked" Rangers. With just three games left in the season, every point counts, and Celtic trail league leaders Hearts by three points. Hearts face Motherwell on Saturday, adding extra pressure on the Hoops to deliver in this derby.

Rangers, meanwhile, are reeling after a heartbreaking 2-1 loss at Tynecastle on Monday, where they squandered a 1-0 lead. That defeat leaves them seven points off the top, all but ending their title hopes. O'Neill expects a fierce response from their rivals, noting, "They played exceptionally well in the first half against Hearts and were in complete control. But Hearts showed their quality, and it seemed to spook Rangers a bit."

For Celtic, it's a must-win scenario to keep their championship dreams alive. O'Neill is confident in his squad's mindset, saying, "The mood is pretty buoyant, that's the most important thing. It's a big game, really big, and we have to win." He also praised the Celtic faithful, adding, "I don't need to give them a message—they know what to do. When the team and fans come together, there's this great feeling of unity. The power of the fans is fantastic."

As the tension builds for this classic rivalry, all eyes will be on Celtic Park. Will the Hoops rise to the occasion and close the gap, or will Rangers roar back? One thing's for sure: in Old Firm battles, expect the unexpected. Gear up for the action with your match-day essentials from our collection—because every great performance starts with the right kit.