The man in charge appeared to be optimistic and praised the squad for their performance, despite the two points dropped.
"Today I've planned the game as we should, with possession, breaking through the lines, and if I'm in charge on Tuesday in Kiev, we'll do the same," he insisted.
"We'll try to lift the team again, they know that they are very good and that they have to believe in themselves."
Even so, the circumstances have been difficult for the former player, who led training for the first time on Thursday.
"I've had very little time to work. I've tried to bring order defensively and offensively and I think they've done that a lot, we've corrected a few things," Sergi analysed.
"When there's a negative result, it's difficult to bounce back."
Despite that, the interim coach felt that the team deserved more from the game, with Alaves scoring from their first shot on target.
"It's feel a bit like we haven't got a reward for the work we did," he insisted, speaking after the final whistle.
"We controlled the game, had chances, we corrected things at half-time which worked, and they scored in an isolated move.
"We had chances, but we haven't converted them."
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