The paper had previously reported the youth graduate of La Masia's release clause is €40m - although this has not been confirmed - while Barca have no desire to negotiate.
However, the arrival of Benfica's Nelson Semedo has put Roberto's first-team place under direct threat and could give suitors hope over the player's potential desire to move.
And in the wake of emergency, Sergi rose to prominence as he starred in a makeshift role, making 47 appearances in total over last season, with 6 assists and a goal to his name.
It will be interesting to see if the club changes its stance on the player's unavailability or the likes of Manchester United and Chelsea are forced to look elsewhere to reinforce their respective squads.More news: Israel attempts to shut down Al Jazeera's office and ban journalists
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The 25-year-old Spanish global has been with the Catalans since he joined the Masia in 2006, and played a starring role after Aleix Vidal went down with an injury last season.
Let's not forget, Sergi was responsible for the most memorable moment for Barcelona last season when he netter a last minute victor over PSG to complete the 6-5 aggregate comeback in Champions.
United is not alone in showing interest in the Spaniard, as fellow Premier League side Chelsea has inquired about Sergi Roberto, although the London-based club has not made a formal offer.
Now, it seems United have turned their attentions to yet another La Liga player - this time Sergi Roberto.
Having missed out on Tottenham Hotspur's Eric Dier, Roberto is reportedly the next target as his future at the Catalan club is supposedly uncertain under manager Ernesto Valverde.