Give it a rest. Many people suspect they have a "supplement" regime that enables them to run opposition into the ground and still put in area to area sprints in the 96th minute. Others say they are just good and super fit.
Those who run football, uefa fifa and the TV Companies don't want it looked into.
Similar situation is said to exist in tennis. The spectacle demands the system.
All sports will have an issue with PED's, I've said that years on here and that the majority of elite athletes will be on PED's.
People seem to forget Football is a team sport of skill and ability.
Also, people need to remember that a drug like steroids and EPO is not magic and you will still have to put the graft in to be a winner.