Clean sheet rush achievement

[Staggy Stagg]

Just been added to manager list, any further information?

[jarharnamme]

probably will start few days later. same like goal rush where you have to score numbers of goals in OFFICIAL MATCHES (not friendly nor event)
here maybe they'll ask your team to have cleansheet & this will be sux for me because i always grouped up with monster teams no matter how many % i try to manipulate. BECAUSE I'M STUCK AT MAX LEVEL ON MY SERVER.
i only managed to complete cleansheet task almost at the last day of season. wtf