The Spanish international forward is high on the wanted list of new City boss Manuel Pellegrini as he looks to replace Carlos Tevez.
Negredo said: "Right now, I'm at Seville and like it very much.
"If I stay that'll be fine but if I leave then it will be because it benefits both the club and myself.
"I'm happy on a personal level - but collectively we have not achieved the goals we wanted.
"Now perhaps I am at a decisive moment for my future."