Arsenal hosts Paris Saint-Germain on April 29 in north London, where defending champion Madrid lost by a stunning 3-0 last week in the first leg of the quarterfinals. PSG hosts the return game on May 7 at Parc des Princes, which has hosted three finals including the inaugural European Cup in 1956.

Barcelona reached the semifinals of the Champions League for the first time in six years, despite being outplayed and comfortably beaten 3-1 by Borussia Dortmund on Tuesday.

In Wednesday's other quarterfinal first leg, Paris Saint-Germain overcame a 1-0 deficit to English Premier League club Aston Villa at the Parc des Princes en route to a 2-1 victory. The decisive rematches will be played next week in Dortmund and Birmingham, respectively. Here are three quick takeaways following Wednesday's games.