Sevilla did enough to see off FC Cluj, drawing 0-0 last night to go through on the away goals rule after a 1-1 result in Romania for the first-leg.
Lopetegui said, "The important thing was the qualification, move to eighths, and we got it.
"We were worthy of passing, we had many chances but with a tight score a goal gives you life. As the minutes passed they grew in the belief of qualifying, but they had their choice in a play that was justly annulled.
"We lacked sharpness, we eliminated a good team and we passed. I see it in a positive way."