The early rounds of the new Champions League campaign have been notable for some high-scoring affairs. In week one, Liverpool needed a late winner to overcome Paris Saint-Germain in a five-goal thriller, while the subsequent round included a 4-2 win for Barcelona against Spurs. PSG overcame that loss to Liverpool by putting six goals past Crvena Zvezda, while there were five goals for Roma as they breezed past Viktoria Plzen. It’s early days, of course, but those numbers suggest that…