The Eastlands club sacked Mancini after three-and-a-half-years recently, exactly 12 months to the day after he led the club to their first title in 44 years, but Soriano has played down suggestions of shakiness saying that the club is simply making an alteration as all others do.
"We don't think we are under any instability," Soriano told the Associated Press.
"We are changing the manager as it happens in other clubs. We feel confident that we will have a good manager and a very good team next year. And I don't think anybody made a mistake on this.
"It's just, as normally as it happens in football, time to change for the good."