Noah Lyles confirmed his position at the top of world sprinting with another blistering performance over 200m.
The 22-year-old surged clear in the Paris Diamond League to take victory in 19.65s, breaking the previous meeting record held by a certain Usain Bolt.
He said afterwards, "I've been putting in some great training sessions but it's always different when you're over here in Europe.
"When I was coming off the turn it felt like such a fast track, the fastest I've ever felt coming off the turn." - Noah Lyles
Lyles will only run the 200m in Doha but it's hard to see anyone stopping him winning his first global title.
He has been seen as one of the successors to eight-time Olympic gold medallist Bolt, and he's certainly heading towards greatness in the half-lap event.
Could Bolt's world record of 19.19s be under threat at the Worlds?
Lyles is more concerned with winning gold:
"Looking to Doha, it's not about going after Bolt's record or anything like that. But when we get there we're willing to go after any record."
World champion Karsten Warholm kept up his superb recent form with victory in the 400m hurdles.
The Norwegian - who recently spoke about his greed for success - finished a long way clear of the rest in 47.26s, just over a tenth of a second outside his European record set in London last month.
His clash with Qatar's Abderrahman Samba and Rai Benjamin of the United States looks set to be one of the highlights of the World Championships.
And Warholm said, "We're all trying to get the work in to be in peak form for Doha. This season is long. At this time of year I'm out on the town usually having fun but there's still a long way to go.
"Everybody is talking about a world record or it taking 46 seconds to win in Doha but when people talk so much it has a tendency of not happening so who knows?" - Karsten Warholm on the World Championship 400m hurdles
Another reigning world champion registering a win was Yulimar Rojas with the Venezuelan taking the triple jump in 15.05m.
This was the 22-year-old's third 15m-plus jump this season and she is the only woman to break that barrier in 2019.
But it sounds like there is plenty more to come. In the mixed zone afterwards she said, "To be honest I'm happy but also a little bit unsatisfied because today I wanted to jump over 15.05m.
"But the reason I'm happy is the training is going well, I'm in good shape, we're doing really good work and now I just need to keep working on it." - Yulimar Rojas
Earlier this month, Rojas set a new national record of 15.11m to win her first Pan American Games title.
The men's triple jump promised fireworks and it delivered.
Rio 2016 sprint double champion Elaine Thompson took victory in the 100m although her winning time of 10.98s was some way down on her best this season.
Newman stuns pole vault champ Stefanidi
Commonwealth champion Alysha Newman completed her move into world class with victory in the pole vault.
Reigning world champion Sam Kendricks took the men's event, clearing 6.00m to equal the meeting record.
With Caster Semenya barred from defending her world 800m title, Hanna Green staked her claim to succeed her with the biggest win of her career.
The American, second in the US Championships behind Ajee Wilson, produced a powerful late burst to get the better of Jamaica's Natoya Goule.
Olympic and world champion Sandra Perkovic suffered another defeat in the discus.
The Croat did produce her second 65m+ throw of the year, but had to settle for the runner-up spot behind Cuba's Olympic bronze medallist Denia Caballero who won with 66.91m.
There was plenty of bumping and barging in the last lap of the men's 1500m but it was Uganda's Ronald Musagala who took the wide route to victory, equalling his own national record of 3:30.58.
There was a win for world champion Tomas Walsh in the shot.
And it was a competition which made history.
And France's decathlon world champion Kevin Mayer showed he's in great shape in a specially arranged triathlon competition.
The Frenchman set personal bests of 17.08m in the shot and 13.55s in the 110m hurdles as he took victory ahead of the USA's Devon Williams.