Lopez was relatively untested during the game, but wil have gained some valuable experience with one eye on next summer's European Championship.
"A complete night," Lopez said on Twitter. "A win, a competitive debut and a great atmosphere in Cadiz. Thanks for the support."
Elsewhere, Turkey duo Cengiz Under and Mert Cetin celebrated qualification for next summer's tournament - after they held on to secure a 0-0 draw with Iceland last week.
The side now face Andorra on Sunday night.
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