Scottish Cup quarter-final drama saw Celtic, missing key players, edge Rangers 5-4 on penalties after a 0-0 stalemate. Despite no shots on target in 120 minutes, Celtic's defense held firm, with goalkeeper Viljami Sinisalo commanding the shootout. Martin O'Neill's side endured a grueling 10-day schedule before this historic comeback, highlighting their resilience amid injury crises.

Celtic's tactical discipline shone as Rangers managed 24 shots, six on target, yet failed to breach a determined Celtic backline. O'Neill praised his players' "phenomenal courage," noting their ability to "refuse to lose" despite being "there for the taking." The result boosts Celtic's Scottish Cup ambitions while keeping them five points behind league leaders Hearts with nine games remaining.

O'Neill's leadership emerges as pivotal, with veterans like Scott Brown driving collective grit. The absence of McGregor and Tierney underscored squad fragility, yet Celtic's fight mirrors their narrow 1-0 league win over Aberdeen last week. Critics question attacking depth, but the victory wounds Rangers in the title race and eases Celtic's path to semi-finals.

This gritty win sets up a semi-final clash with St Mirren, who previously denied Celtic the League Cup. With a week to regroup before facing Motherwell, Celtic's survival hinges on replicating this defensive resolve. As O'Neill admits, "We're far from the finished article," but this improbable triumph proves their ability to punch above expectations when it matters most.