Dalilah Muhammad breaks world record and Noah Lyles bests Christian Coleman

Dalilah Muhammad had another night to remember in Iowa.

The Rio 2016 champ broke a world record that's stood for 16 years.

She went 52.20 seconds on a wet track to shave .14 off Russian Yuliya Pechonkina‘s previous record of 53.60 set back in 2003.

The 29-year-old will be obvious favourite at the Doha World Champs a couple of months from now, flanked by another serious contender in Sydney McLaughlin who is going to her first Worlds.

The 19-year-old was the the youngest U.S. Olympic track and field competitor since 1972 at Rio 2016, and there's so much more to come.

McLaughlin started Sunday’s 400m final with the world's fastest time this year - 52.88 - giving her reason to lay a claim on gold before Muhammad came up with a history-making 400m hurdles run.

The other two members of a fearsome four USA team heading to Doha are Olympic bronze medallist Ashley Spencer and defending world champion Kori Carter.

Watch out Worlds.

Noah Lyles vs. Christian Coleman

Noah Lyles (19.78) defeated Christian Coleman (20.02) in the 200m final.

Then he had a little dance in Des Moines.

The win gave Lyles his first USA worlds team spot.

Christian Coleman's second place sets up a 200m showdown between the two in Doha.

Lyles didn't run the 100m this year to focus on the 200, but is likely to aim to race both at Tokyo 2020 where he's on course to face Coleman in each.

22-year-old Lyles' fastest 200m time this year is 19.50 seconds - only Usain Bolt, Yohan Blake and Michael Johnson have run it faster.

While Coleman is the fastest man in the world over 100m for three years running.

The two will face off in the 200m in Doha.

And a double 100m-200m showdown at Tokyo 2020 is something we can all look forward to.