If anything, I would dare to say that there is a chance that playing at home could impact negatively on the performance of a team, because the expectations placed over them, which could lead to stress and mistakes during the match.
It comes to mind the famous Germany Vs. Brazil during the 2014 world cup.
If I have time, tomorrow I would do some research and see if I can find some statistics about Playing at home.
Playing at home clearly gives you an advantage. Here are the world cup winners at home:
1930, Uruguay
1934, Italy
1966, England
1974, West Germany
1978, Argentina
1998, France
And you can see that the best performance of each team is usually when they hosted the world cup.
A good team with good players is already a good team, and they would play well no matter where they go, team that lacks good players will still fall behind even if the match is brought to them in their home, example is the previous world cup that just ended last year, hosted by Qatar, Qatar as a team where among the first teams to be disqualified from the world cup tournament, why didn't they play for longer since they were the host?.
There are many examples when a country hosted the world cup, but it did not help them become the world champion in football.
Brazil even hosted the World Cup twice, in 1950 and 2014, but that didn't help them become world champions.
Neither Germany managed to become world champion in 2006 at the world cup in Germany, nor Italy in 1990 at the world cup in Italy. We have many other examples like Spain in the 1982 World Cup in Spain.
The team that is the best will show it, regardless of where it plays, at home or away
![Grin](https://bitcointalk.org/Smileys/default/grin.gif)
Of course, some national teams became world champions at the world cups organized in their countries, but not only because of that, but also because they deserved it with their team quality.