After the match went to penalties, Rulli saved the decisive spotkick from De Gea to see Villarreal win in Gdansk.
Ahead of tonight's Champions League reunion, the Argentine said: "I would have preferred for the shoot-out to end before, and for me to stop any of the kicks instead of the keeper's.
"We do the same job and it's a thankless one sometimes. I know how a goalkeeper suffers so I would have preferred to stop a kick from an outfield player."
Of his own successful penalty he recalls not even realising it was his turn: "I remember the previous penalty from [Victor] Lindelof and I was upset because I'd got a touch to it without stopping it.
"I had lost count, with so many penalties taken, and when I was walking away from the goal the referee said to me: 'Keeper, it's your turn to take'.
"It first I did a double take: Me? Are you sure no one has been missed out? Then from the moment I took the ball all I was thinking about was hitting the back of the net.
"I'd never practiced taking a penalty myself beyond messing around in training with a team-mate.
"It was a case of hit it hard and try to get it high. Hard and high, exactly what us goalkeepers don't like. I hit it with all that I had left, my heart and soul. And luckily it went in."
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