In a tense, tactical battle in Lisbon, a moment of late magic from substitute Kai Havertz handed Arsenal a precious 1-0 advantage in their Champions League quarter-final first leg against Sporting CP.

The German international, introduced in the second half, was the coolest man in the Estádio José Alvalade, poking home Gabriel Martinelli's pinpoint pass deep into stoppage time to break Portuguese hearts and snatch a crucial away win.

For much of the evening, it looked like Arsenal's European journey might hit a stubborn roadblock. The Gunners controlled possession but found clear chances hard to come by against a disciplined Sporting side, who were dangerous on the break. Goalkeeper David Raya was Arsenal's hero for long periods, making a spectacular early save to tip a rocket onto the bar and a stunning double stop late in the game to keep the scores level.

Mikel Arteta's men even had a goal chalked off by VAR in the second half, adding to the mounting frustration. But as the clock ticked down, the manager's changes paid off. The injection of pace from Martinelli and the clinical instinct of Havertz combined for the decisive moment, showcasing the squad depth that defines top teams in this competition.

While the single-goal lead is slender, an away win without conceding is a massive result in a two-legged tie. The pressure now shifts to the Emirates Stadium next week, where a roaring home crowd will be ready to push Arsenal toward the semi-finals. First, however, the focus turns back to the Premier League title race, with every player knowing that performances like this—gritty, resilient, and finding a way to win—are what define a season.