Barcelona crashed out of the Champions League for a second straight season.
The Blaugrana failed to qualify to progress to the round-of-16 of the Champions League for the second year in a row.
They have won only one and lost three of their five Group C games this season in the European competition.
Xavi will now shift his optimism with Barca second in LaLiga and will fight for domestic trophies this campaign.
“We have nothing to play for, but this [Viktoria Plzen] is an important game,” Xavi said. “We want to end this competition well.
“We lack maturity. We have a lot of youngsters and we’ve had the worst Champions League group in years. We’ve had injuries. They’re not excuses, but that has hurt us. With respect to last season, we have a better squad and we have given a better image in Europe. But we haven’t been up to the task.”