By Jonathan Wilson After a rocky start to the season, the Blues’ 3–0 victory against the Serie A champion has jumpstarted their Champions League campaign. Everybody at Stamford Bridge can take a breath. The Graham Potter era is properly underway and Chelsea’s 2022-23 Champions League campaign has finally got started. An emphatic 3–0 victory over AC Milan was important in lifting Chelsea to second in the group, but perhaps also in helping to dispel some of the doubts lurking in certain quarters about Potter’s credibility—although whether a win over an AC Milan side playing as badly as this mean…