The 23-year-old was one of the outstanding performers in Barcelona's 6-1 victory over Alavés, scoring once and providing two assists in an emphatic response from Hansi Flick's side.
His contribution took him to six goals and six assists in 13 appearances across all competitions this season, underlining his growing importance to the Catalan club.
Fermín's form has reportedly attracted renewed interest from Manchester United, who are assessing potential midfield reinforcements ahead of the January transfer window.
However, the Spain international was unequivocal when asked about the speculation after the Alavés match.
“I don't pay attention to that kind of news. I want to stay at Barça for as long as possible. I hope to finish my football career at this club and retire here,” he said.
The midfielder's response leaves little doubt about his immediate priorities, despite the reported attention from England.
Fermín has become an important part of Flick's plans, offering a different profile to Dani Olmo, who also operates in the attacking midfield position.
While the two players share a preferred area of the pitch, Fermín brings greater energy and directness, regularly looking to make forward runs and contribute goals from advanced positions.
His latest performance against Alavés demonstrated that threat. He scored and supplied two assists as Barcelona produced a convincing attacking display, with his individual contribution helping the team return to winning ways.
There is also little contractual pressure on Barcelona to consider a sale. Fermín signed a long-term agreement that runs until June 2031, giving the club a strong position should interest from Manchester United or elsewhere develop into a formal approach.
For now, the player's own message is clear. Despite the speculation surrounding his future, Fermín wants to continue his career at Barcelona and has openly expressed the ambition to remain there until retirement.