Sprint sensation Usain Bolt blasted to a big win the 100m at the London Grand Prix in Crystal Palace on Friday.
The Jamaican world record holder raced to the finish line in 9.91 seconds, even though it was a pretty windy evening AND he wasn't fully fit.
After the race Bolt said he needed a few more weeks training to get ready for the World Championships in August.
The first British sprinter to finish in the race was Simeon Williamson, who came home in fourth place.
The news was better for British athletes in other events, especially in the women's 800m
Jemma Simpson wins the women's 800m
Jemma Simpson won that race, beating Brits into second and third place, finishing ahead of Jenny Meadows and Marilyn Okoro.
Afterwards Simpson said: "The 800m at the World Championships in Berlin is wide open and I wouldn't put it past one of us to win a medal."
Other British winners were Nicola Sanders in the women's 400m and Mo Farah in the men's 5,000m.