I don't think Ozil was a massive mistake at all, the massive mistake was that we signed Yaya Sanogo and Flamini to compliment him. Aside from Sanchez, we following that by signing dross like Chambers, Welbeck, Debuchy, Elneny, Cech, Xhaka, Mustafi and Perez in the 3 years that followed. That period of transfers was a disaster, and we compounded it with more largely unsuccessful deals like Laca, Kolasinac, Mkhi, Torreira, Guendouzi and Sokratis.