Imo, that won't be enough, unless we are lucky. The result after the 1st half could have easily been 2:1 Real, or 3:2. They had the better chances. We had a good spell after the goal but weren't stable in defence before and after that.
It's football. Mistakes, red cards, etc. happen. But we need a better performance than in that 1st half where Real could have been 2 up before we created something.
For that purpose, we need more stability in midfield, putting Bernie and maybe Kova next to Nico. Starting with 4 attacking players is too risky. Gvardiol can help us in attack if/when possible.