Zidane takes on his former boss

BARCELONA, SPAIN As if a combined 16 European Cups weren’t enough, the Champions League quarterfinal between Real Madrid and Bayern Munich will also offer an intriguing duel between master and pupil.

Zinedine Zidane’s transition from retired player to successful coach at Madrid owes a lot to his time at the club under current Bayern boss Carlo Ancelotti.

Come Wednesday, the former colleagues will face off in the first of two contests to determine which will guide his team to Europe’s final four.

A brief look at all four quarterfinals:

Juventus vs. Barcelona Barcelona returns to the Champions League on Tuesday for its first match since its historic 6-1 victory over Paris Saint-Germain that made it the first team to overturn a 4-0 first-leg loss in the history of the competition. But the Catalan club heads into the rematch of the 2015 final it won against Juventus on the heels of a costly 2-0 loss at Malaga on Saturday.

Borussia Dortmund vs. Monaco

If you want goals, look no further than Tuesday’s match between Borussia Dortmund and Monaco. Monaco has a whopping 133 goals in all competitions this season, including a bundle by teenage standout Kylian Mbappe.

Atletico Madrid vs. Leicester

As the only side in the quarterfinals that had to play a domestic fixture, Leicester comes into the match having lost its unbeaten record under new manager Craig Shakespeare.

Bayern Munich vs. Real Madrid Besides relying on its own potent attack, Bayern will also hope that Cristiano Ronaldo continues to struggle in front of the goal this season in Europe. The Champions League’s all-time scorer with 95 career goals has struck only twice this campaign.