Where are the defenders?

I think it would be fair to say if you were to ask most people to people look back at what has set this Premier League season apart from others the answer you’d get would have to be: high-scoring games. For a slightly more pessimistic view: bad defending.
It is in the big games where this has been most noticeable. Of course, without a clear-cut top four as in previous seasons it might be debatable as to what constitutes a ‘big game’ or a ‘big team,’ but assuming Spurs and Chelsea are still seen as top four challengers even if they don’t make it there this s...