If I remember correctly, it was Tito's. The "dm who can play cb" stuff being the determinant reason, and because Keita left. This was a really bad call, to put it mildly.
He was great today against inter, and scored a nice header.
He was only going by good example of Mascherano. Argentinian was voted as our 2nd best player of last season. Didn't turn out as planned but it was a rational decision by Tito.