Fernandes was questioned over his future after starring for Portugal as they claimed the inaugural Uefa Nations League trophy with a 1-0 win over Holland on Sunday night.
Fernandes has been on the club's radar since the turn of the year and it now appears that the hierarchy have made the move to sign him with interest from elsewhere.
"With Bruno Fernandes, Sporting is demanding €70m [£61.5m]", Krithinas told The Transfer Window podcast.More news: Justin Bieber challenges Tom Cruise to UFC fight
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With the Frenchman still at the club, Manchester United are unsure about bringing in one more forward-thinking midfielder such as Fernandes despite their interest in him.
"I know nothing, I will take the next few days to understand what is true", he said. They say Sporting are preparing themselves for any scenario, even one where Bruno would stay at the club, and that's why they would pay him a salary of €5m per season, the biggest in the squad. I don't need to move, I'm not trying to leave.
'If the opportunity comes to go to a team that you can't refuse, I'll talk to Sporting'.
Fernandes returned home two years ago after playing for Novara, Udinese and Sampdoria in Italy. "I still watch the Italian championship: both Inter and the others, I follow them all".