CHESTER — Expected or not, the Philadelphia Union have played from ahead most of the season in the chase for the Supporters’ Shield. The approach to Saturday’s rarity — a win and the trophy is yours situation against New York City FC — is no different. The Union (19-7-6, 63 points) can hit 66 points and 20 wins if they defeat third-placed New York City FC on Saturday (7:30 p.m., Apple TV+). It is coming off a derby win over New York Red Bulls that effectively ended their rival’s playoff hopes. I know he’s going to pass through this and he’s going to be even stronger.