Xavi urged Barcelona to keep believing in the project after his side crashed out of the Europa League on Thursday.
Barca stumbled in the Europa League quarter-final as they were eliminated by Eintracht Frankfurt, but their LaLiga form remains impressive and has guided them to second in the table.
The Blaugrana are 12 points behind leaders Real Madrid, who play third-placed Sevilla on Sunday, and are unbeaten in their last 15 Spanish top-flight games, winning their last seven.
Xavi insists his team must forget about the failure in Europe if they are to register eight straight league wins for the first time since January 2019 when they host Cadiz on Monday.
When we started in November, we knew we needed to be more competitive, that five or six years ago we didn t compete well enough in Europe, he told reporters at a pre-match news conference.
We have to keep believing in the project, we competed well in Napoli, not against Eintracht.
It s a tough blow, they ve eliminated us from the Europa League that we hoped to win to qualify for the Champions League and we haven t succeeded.
We are encouraging the group, making them see where we have failed, also what we have done well. In short, it is to continue believing in what we are working on. Little by little, with patience.
Now it s time to focus on securing the Champions League [via LaLiga].
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As for questions over his tactical methods, Xavi responded: We have won five Champion League titles with this style. The style that [Johan] Cruyff imposed has given us much success.
If we have doubts, we must improve this game system, what we must not do is rest on it. If we are making mistakes, we must improve it.
Barca will be hoping to have the Camp Nou filled by home fans against Cadiz, as opposed to the masses of away Eintracht fans – estimated to have been around 25,000 – that made it in for the Europa League.
Blaugrana president Joan Laporta acknowledged he was ashamed with the ticketing situation against the Bundesliga side, and Xavi confirmed the matter was being investigated internally.
The club is working to solve it, as soon as they have an explanation, first they will tell us and then the media, he added.
The players did not feel at home. It was a bad night in every way.