actually, there are so-called illegal formations for example if you go into the squad section and actually place players where they ought not to be it will tell you that you have an illegal formation. For example, you really should not play with a defense with DR and DL and then have for example ML MC MR and an AMR, and AML too many players on the wings and it will flag you as an illegal formation it will let you play it but as I heard it would penalize that team in the match. Some managers place players in positions that make the team illegal formation, they really should be disqualified and forfeit that game but this is Nordeus Top Eleven they allow everything