Bernie Ecclestone has admitted that Formula 1 destroyed his marriage.The F1 chief executive was married to Slavica Radic, the mother of his two daughters, for almost 25 years (1985 to 2009).It turns out even billionaire's have to work eight hours a day and Ecclestone says his dedication to the sport probably resulted in his divorce. 'I TORTURED HER'Ecclestone said: "I have worked very, very hard for Formula 1 and probably so intensively that it destroyed my marriage. I'm too busy and I enjoy what I do. Most of the time I work from nine to six, and even then in the evenings, seven days a week."She (Slavica) was not happy about it. I tortured her with my work for 25 years and now she travels around the world like there's no tomorrow. She's trying to catch up," said Ecclestone.Asked if he ever goes on holiday, he added: "Very rarely, and not for long anyway. Ten days off was the most I've done in 50 years. I don't need to rest."