The Ukrainian outfit's manager insists the club will be forced to sell if the Brazil star's 50m euro release clause is met with Roberto Mancini's side having been heavily linked.
Shakhtar Donetsk manager Mircea Lucescu has hit out at Manchester City's reported pursuit of Fernandinho, claiming the Premier League side is not at the same level as the Ukrainian outfit.
Speculation in the English media on Tuesday morning linked the 27-year-old with a move to the Etihad Stadium, with Blues boss Roberto Mancini expected to overhaul his squad after missing out on the title.
Lucescu insists Fernandinho will only be sold if his release clause is met, but he feels a move to City would be a step down for the midfielder.
"If City want to [sign Fernandinho], the clause is 50 million euros," Lucescu told PRO TV. "If our players receive offers from teams higher than Shakhtar, we do everything possible to help them. Currently, I think Manchester City is not at our level."
The five-time capped Brazil international is contracted to the Ukraine champion until 2016, having joined for 7m pounds from Atletico Paranaense in 2005, and won the UEFA Cup in 2009 with the club.