Champions League takeaways: Barcelona's comeback stuns Benfica, Liverpool keeps rolling
Last year's runner-up, Borussia Dortmund, entered the day with a chance to jump as high as second place in the 36th team table only to squander a 1-0 halftime lead in Italy and lose to Bologna, while Barcelona stormed back from a multi-goal second half deficit to take all three points in rain-soaked Lisbon.