From last years
UEFA Champions League Rule Book (this years doesnt seem to be available yet but it seems unlikely that they would have changed something like this)
17.20
If a club cannot count on the services of at least two goalkeepers registered
on List A because of long-term injury or illness, the club concerned may
temporarily replace the goalkeeper concerned and register a new goalkeeper
at any time during the season and complete the official registration list A with
a goalkeeper fit to be fielded. If the replaced goalkeeper was registered as a
locally trained player, the new goalkeeper does not need to be a locally
trained player. The club must provide UEFA with the necessary medical
evidence. UEFA may require further medical examination of the goalkeeper
by an expert appointed by UEFA at the cost of the club. Once the injured or
ill goalkeeper is fit to be fielded again he can resume his position in place of
his nominated substitute. The change must be announced to the UEFA
administration 24 hours before the next match in which the goalkeeper is due
to play.
your defense is old, for me pirlo,dinho,pato and huntelaar in a great day of course it's very good and i'm scared of this four players 
excuse me for my bad english i'm french 
