By Jonathan Wilson There is a sense of optimism and opportunity at the Emirates, but there remains a key question about Mikel Arteta’s side when it comes to facing top teams. View the original article to see embedded media. There is a very clear pattern about Arsenal these days. It wins a handful of games in a row and everybody gets very excited, and then it plays a big side and loses, and everybody realizes its wins were all against weaker teams. And that’s why, quite apart from the points on offer, Wednesday’s home game against Liverpool is so important. It’s also why the most encouraging pe…