Liverpool keeper Adrian, a free agent nine days ago, said his key penalty shootout save in their Uefa Super Cup win over Chelsea capped a "crazy week".
The 32-year-old was released by West Ham in June and signed for Liverpool on 5 August, jumping up the pecking order after an injury to Alisson.
His heroics inspired boss Jurgen Klopp to channel his inner Rocky Balboa when he shouted "Adriaaann" in a pitchside interview.
"Like Rocky," he added. "What a story."
Adrian saved Tammy Abraham's penalty as Liverpool won 5-4 in the shootout in Istanbul.
"Welcome to Liverpool!" Adrian told BT Sport. "I'm really happy for the team, I'm happy to play for Liverpool and happy for the fans. It was a long game but in the end a great finish for us."