4) Questionable tactical changes
Whilst being rigid in his possession-based playing style, Guardiola has been a little more experimental in the shape of his team or the positions of his players, though usually not to great effect. The 43-year-old experimented with a 3-4-3 formation at Barca and it went badly wrong, as did using Fabregas as a false 9, whilst his use of Philipp Lahm as a defensive midfielder when he is arguably the best right-back in the world is also fairly questionable.