Actually, and he has a history of doing this, Mejuto Gonzalez stepped on the brake after 30 minutes and finally booked someone (Cole). It didn't matter who, it was just that he had to show he was in charge and did see what happened. He wasn't fooled by dives, but he also let the game go on after rather serieus fouls, for the sake of speed, it seemed.
Among his mistakes was letting Joe Cole get away without a yellow card. He missed a corner shot, and a few minor things, especially in the second half, as if he was getting tired as well. Most of this wasn't very important although i'm not sure about the cancelled goal by Dirk Kuyt, it could have been off side but.... Let's give Mejuto Gonzalez the benefit of the doubt.
Even if you buy all Russian factories, strip them, sell them in parts, empty pensionfunds and take all the money out of your country in plastic bags by the truckload and use it to buy every player willing to play for you, it is still not certain you will win the Champions League. Actually, maybe your chances will diminish: a ridiculously high sum for a player seems to be counter productive. Chelsea might never win a big prize.