Sevilla took the early lead through Ever Banega, who fired home with a swirling long-range effort, before Messi chose to seize the occasion and Barcelona’s class shone through.
The reigning European champions tore into a 4-1 lead with Messi scoring two world-class free kicks, and a close-range effort Rafinha and an impressive finish from Luis Suarez.
However, with Luis Enrique’s side perhaps taking their foot off the gas, and Sevilla, maybe shorn of pressure, re-establishing themselves, steadily they got themselves back into the contest.
Jose Antonio Reyes, Kevin Gameiro and Yevhen Konoplyanka each scored—stunning Barca—to take the game to extra time.
Here, Pedro, so often a peripheral figure in recent seasons, and linked heavily with a move to Manchester United, came to the fore.
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The wideman, seemingly desperate to leave Barca fans with one final fond memory, finished from close range to ensure the reigning Spanish champions won their first silverware of the new season.