When the draw for the last 16 of the Champions League is made before Christmas, the warning always comes: wait till February. What can look a straightforward tie as the group stage ends may appear very different a couple of months down the line as form fluctuates and injuries, managerial changes and January signings take effect.
Recently that has tended to mean the superclubs asserting themselves, financial muscle powering through whatever blips may have occurred in the autumn. But as the Champions League knockout stage begins on Tuesday, very little has settled down and the competition looks more open than it has done for a decade or more.
