And that was the case with Anita Wlodarczyk POL, the overwhelming favourite for the women's Hammer title - but she gave her fellow country-women and men some very nervous moments. Having sustained an injury to her hand in training, her first few efforts in the circle were on a par with her competitors, whereas she has been so far ahead of everyone throughout 2017, that there was talk of a possible world record. Eventually she found her rhythm, and the 4kg ball and chain went further than anyone else.
It was but one of the dramatic events on the fourth day of competition, giving the capacity crowd much to cheer about - the women's 1500m was extra-close; the men's 110m Hurdles not so, which is unusual; but the women's Triple Jump first and second places were separated by just 2cm!
And what about the juniors on show? Salwa Eid Nasser BRN was fastest in the women's 400m semi-finals. Cristian Nápoles CUB stretched out as 3rd best beyond the 17m qualifying distance needed to advance to the final of the Triple Jump. Plus there was a couple in the men's 200m heats.