Something everyone said they could not do apparently.
They managed to beat Barcelona in the Champions League and did not exactly do too badly against Real Madrid in the league either, beating them at the Santiago Bernabeu for the first time since the last decade.
To face Champions League games and Liga games that are all must win – and actually win them speaks volumes.
Simeone does not rotate, their players get no rest and have to perform no matter what. And they have.