There is still the second leg that will be happening in camp no, real madrid is still possible to surpass it and winning the match against barcelona. The own goal that already made by militao was a very bad mistake by him. That was making real madrid loses its confidence to win against barcelona in the santiago bernabeu. The next match gonna happen in camp nou. Real can come back anytime soon. I think that if militao didn't make mistake like that and the result gonna be draw.
It's very good to see that real madrid has not yet lose its chance to win against barcelona caused by second leg is still available.
The second Leg will hold in Camp Nou as rightly stated. It might be difficult for Madrid to surpass Barcelona in their home stadium. Al though the real victor for the Copa del Rey semi-final between this two rivals is not conclusive yet because Madrid can still turn things around but the fact the second leg will hold in Camp Nou makes Barcelona more advantageous than Madrid.
I would certainly not write off Real Madrid yet. This has happened way too often now that they were with their back against the wall and turned an ugly situation into a positive outcome for them. Now the game in Barcelona will be harder because chances are good that Barcelona has more players available by then. That is clearly a chance that Real Madrid missed today.
The game today says nothing about the game that will be in La Liga. It could have gone either way today as well. Modric's chance after 30 seconds could have been a goal, it was no off-side. Benzema could have timed his run into the box better and thereby avoid off-side when he scored that goal. Sometimes the own goal also doesn't happen the way it happened.
We are discussing about nuances here and even the Copa del Rey is not a done deal yet for Barcelona. Taking the lead in Barcelona is not impossible for Real Madrid. I would say that the chances are about 60:40 for Barcelona at this point.