Massive price tag, key area of the team, one where you aim to build an entire side around - totally useless.
With the likes of Sandro, wages aside, the outlay for the punt wasn't as bad and he wasn't brought in as a key player. Klaassen we made a bit of money back on and the mistake was fixed quickly.
But with Sigurdsson he was a financial drain and a footballing one. No other signing in our recent history has come close to being as detrimental as his.
all Koemans mate lol