I think he thought Colaci would take it so he was late to react
Generally speaking he was terrible in reception more than he was good in attack. Anyway I agree that Zaytsev and Juantorena looked very tired as the match went on. Vettori looks less and less NT material as time goes by.
To be honest I think Russia is a better opponent for us than Serbia in the quarterfinals. Poland is another category (though unconvincing as they looked so far), but if we want the gold medal it doesn't matter how harder the route became.