Is avoiding injuries the key to success?

Yes it is, according to professor Jan Ekstrand. If you have only 80 % of your players available there it is far less likely to do well compared to teams with 90 % health situation.

The full story in the link below.

http://www.sydsvenskan.se/sport/fotboll/article839562/Skadefri-trupp-lika-med-framgang.html