Italy's Marcell Jacobs has qualified for the 100m semifinals. The Olympic champion came in second in his heat in 10''05 (the first three qualified). "I had to preserve my energy ahead of tomorrow, so I did not overdo it", Jacobs said Saturday after the race. "I feel very well, and I hope I will have the right feelings tomorrow on the track. "I am happy to be here, the atmosphere is fantastic", Jacobs told Eurosport. Source: Ansa News Agency