Sometimes things just go wrong.
Despite great planning, seemingly great execution and lofty hopes, projects can fall flat on their faces—and football clubs provide a yearly reminder of this.
The cycle is well-rehearsed: make waves during the summer, build hype via high-profile transfer work, enter the season fresh with optimism...and come hurtling back down to earth pretty swiftly.
Already we've seen numerous big-name teams tumble down the table, performing well below expectations, and some heads have rolled as a result. More, surely, will follow in the coming months.
Here, Bleacher Report has picked out the 10 most disappointing teams in Europe's top-five leagues, assessed their issues and suggested a remedy or two.