5 things to watch out for as Real Madrid play Juventus in the UEFA Champions League quarter-final 2nd leg

#5 The best club defence units go head to head

Sergio Ramos (r) - the goal-scoring defender?

It would be outrageous not to mention the defensive systems possessed by both the teams. Real Madrid and Juventus have the best defenses, and it would be interesting to see how well they fare when pitted against each other.

Real Madrid have been led superbly by the talisman Sergio Ramos, who has grown into one of the best defenders since joining Real in 2005. Raphael Varane compliments Ramos as the other center-back.

Daniel Carvajal plays in the right-back position while the left wing-back position is occupied by Marcelo Vieira, who draws comparisons with the legendary Roberto Carlos because of his complete play.

Juventus' back four is lead by the very disciplined and mature Giorgio Chiellini, who is the heart of Italy's defence aswell. Ever since Leonardo Bonucci went to AC Milan, Chiellini has been partnered by Andrea Barzagli who can also play in the right-back position.

Alex Sandro could make a comeback, but Asamoah has impressed of late and could play in the left-back position. Young defender Danielle Rugani could play as a center-back and de Sciglio would be occupying the right-back position.

It would be a treat to watch both teams go against each other. Will Juventus conjure an upset against Real? Only time will reveal the results.