On the whole a very competent performance I thought from Estrada, I was watching a few rows from the front in our singing section, so perhaps I wasn't best placed to judge but from what I could see, I thought the Spaniard had a good game. On two occasions I thought players were fortunate not to receive yellow cards, a Danish player made a challenge on our keeper that seemed to lead with the studs, from my vantage point I thought it could have warranted a yellow card also Hendrick made a challenge that again from where I was (much further away than Mr.Estrada Fernandez!) looked YC worthy. The 93rd min caution for simulation for Duffy looked correct and there wasn't even huge complaint among our fans with a number remarking that he deserved it! All other YCs seemed spot on.
Other than that perhaps 3/4 free kicks missed but on the whole I thought that Estrada was fairly anonymous which is surely all a referee can ask for!