Champions League Vibe Check: Barcelona, Bayern Munich impress; Manchester United in trouble

Getty Images The UEFA Champions League will transition into midseason mode this week with several key matchups that will test teams’ abilities to make deep runs in this season’s competition – or win the whole thing by late spring. Two games in, a few familiar themes are emerging. Back-to-back champions Paris Saint-Germain remain the team to beat while Real Madrid continue to find a way out of trouble, even if wins should feel more elusive to the Spanish giants. Not everyone is in trademark form, though, fascinating subplots emerging as they each begin to chart a way to the podium.…