Before Sunday, only once in World Championship history had we witnessed a woman dip under 11 seconds in the first round heats of the 100m. This morning, we saw four women break through that barrier.

Morning session spectators at major championships often are rewarded with a treat, but those in the Bird s Nest stadium on Sunday morning got a rare treat indeed as they witnessed a fabulous round of 400m heats.

Kaliese Spencer erased all doubts about her shape after a mid-season injury, easily advancing to the semifinals of the 400m hurdles, along with the defending champion Zuzana Hejnova.

There was great controversy in the heptathlon long jump with Katarina Johnson-Thompson in contention for the gold medal recording three fouls.

Shot putters, generally, are not morning people and it showed on Sunday as only three men passed the automatic qualifying distance of 20.65m, with USA's 2015 world leader Joe Kovacs leading the way with 21.36m.

Choose a job you love, goes an ancient Chinese proverb, and you ll never have to work a day in your life.