Rangers' Scottish Cup quarterfinal match against Celtic ended in a 0-0 draw, but Celtic emerged victorious in the shootout, winning 4-2. The match was marked by a pitch invasion and clashes between fans, with flares thrown onto the pitch and police forced to intervene. Rangers head coach Danny Rohl expressed disappointment at the scenes, stating that the atmosphere had been great for 120 minutes, but the events that followed should not be part of football. Celtic's Martin O'Neill also commented on the incident, saying he would think about it and speak later. The Scottish Football Association has announced an investigation into the incident. The match was a significant one, with Celtic winning a Scottish Cup tie at Ibrox for the first time since 1957. Rangers' James Tavernier and Djeidi Gassama missed the decisive penalties, while Celtic's Tomas Cvancara scored the winning penalty. The Old Firm rivalry between Rangers and Celtic is one of the most fraught in football, with a long history of sectarian tensions and intense matches. The two teams have dominated Scottish football, with over 40 years since any other team won the league. The rivalry is not just about the football, but also about the sectarian politics of Glasgow, Scotland, and Northern Ireland. Rangers' support has historically been drawn from Protestant communities, while Celtic's support has come from Irish Scots and those with Catholic backgrounds. The incident at Ibrox has sparked an investigation and raised concerns about fan behavior. The Scottish Football Association has condemned the behavior of the fans and will be taking action. The match was a significant one for both teams, with Celtic advancing to the next round of the Scottish Cup. Rangers will look to bounce back from the loss and focus on their upcoming matches. The incident has also sparked a debate about fan behavior and the need for increased security measures at football matches.