In 2018, Shelby Houlihan enjoyed one of the greatest seasons ever by an American female on the track, but it wasn't quite enough to get her a world #1 ranking.

For the third year in a row, Caster Semenya was undefeated but was this the last of her dominance?  Domestically, Ajee Wilson was the best of a strong group of US runners. Should US#3 Ce'Aira Brown be ranked in the world's top 10?

Sifan Hassan and Dawit Seyaum, who went 3-4 at Worlds last year, are the favorites, but Martinez has been in good form this year and has a real shot at a medal.

Farah has proven himself as the favorite for 5k/10k gold in Beijing but Bolt still has work to do to catch Justin Gatlin. Can he get closer in London? Farah faces Lopez Lomong & Bernard Lagat in the 3k, plus an American-heavy women's 1,500 featuring Lauren Johnson, Katie Mackey, Treniere Moser and many more.

Abeba Aregawi went out and crushed the field. There have now been 3 DQs after the race. Moving Canada's Nicole Sifuentes to bronze and Treniere Moser to 4th (and back to 5th after an appeal).