Barcelona did not have enough coordination in the attacking. A lot of times someone was shooting and there was someone else almost blocking the shot. Even a clear goal was also denied for Barcelona by a Barcelona player because he got in the way.
At the same time, I have to say Barcelona was really lucky to win this match. Because the first goal and the only goal that was scored in this match was actually saved by Courtois. But the Real Madrid defenders, two of them were unable to keep that ball out when the ball hit their bodies. I wonder if Barcelona will be able to win the second leg of the Copa del Rey semi-final as well.
The conditions are quite reasonable because they did not play with their full strength in this game.
On the other hand, it was an incident that was not intentional and it was almost that time Kissie was able to score his second goal and he was also a bit not too happy about it because he was hit by his own player.
But even so I think the aggregate is still in their favour now as being ahead and playing the second leg at Camp Nou clearly makes them the favourites.