Novak Djokovic has recalled the ‘horror’ of his childhood ahead of his last clash with Rafael Nadal on Saturday. The 37-year-old grew up in war-torn Serbia, something he’s discussed openly in the past. Djokovic has now revealed how scared he was as a youngster, admitting that he and his family constantly feared bombs being dropped from the skies. Speaking to La Nacion, he said: “It’s a horror. The worst thing anyone can experience. It’s the fear of the unknown. Not knowing if the next bomb is going to hit your head. “And so it was every day, the alarms, the sirens that woke us up every night w…