A quote from the race announcer of the men's 1500:
"And it hasn't been an easy season for centrowitz, he ran really well in mid may beating mo farah in a 1500 meters, ran very fast. then he had a virus, then he strained his groin on both sides, but I went out and watched some of his training over the last 3 weeks and he's done some really strong workouts. Included one where he ran 1000m at sort of 3:30 1500 pace then cameback and ran two very fast 400s."
Centro definitely exxagerated the heck of it. Yea he had a lot of setbacks but he did not get himself into shape in 10 days...