The Spanish goalkeeper, who joined the Reds only nine days ago, made his first start in Istanbul on Wednesday night as the Premier League rivals drew 2-2 after extra-time.
And Adrian produced the decisive save from Tammy Abraham in the subsequent shootout, following five successful Liverpool spot-kicks, to clinch the club’s fourth Super Cup triumph.
“Welcome to Liverpool!” he told BT Sport of his whirlwind start. “It was a crazy week but with [my teammates] it’s so easy playing at the back.
“I’m really happy for the team to get the trophy. I’m really happy to play for Liverpool and really happy for the fans because they enjoyed tonight.