(ANSA) - London, July 30 - Federica Pellegrini has said she will take a year off from swimming after coming only fifth in the 400 metres freestyle at the London Olympics. The 23-year-old still has a chance of claiming glory in London as she will start the defence of her 200, freestyle Olympic title in the qualifiers on Monday, although her morale was dented by Sunday's failure. "I gave my all. I'm disappointed because it was possible to win with a time of four minutes, one second (as France's Camille Muffat did)," said Pellegrini, who is the world record holder in the 400m with a time of 3:59.15. "Physically, I'm fine. I'm not looking for excuses and I don't want to blame anyone. I categorically exclude there being a mental issue. I went out to attack, but I didn't have any more to give". Pellegrini confirmed that she plans to take a sabbatical, adding, ominously for her fans, that "naturally, who knows what will happen if I like the rest".