Tyson Gay triumphs on his return to action in New York
Ex-world champion Tyson Gay competed for the first time in a year as he won the 100m B race in 10.0 seconds at the Diamond League meeting in New York.
Gay, the second fastest man ever over 100m with 9.69s, had been out with a hip injury since June 2011.
Having run into a headwind of 1.5m/sec, Gay said: "For my first race in a while, that's not a bad time."
British athletes put in a series of strong displays, including a personal best for Andrew Osagie in the 800m.
The 24-year-old claimed third place in a time of 1:44.61, which was 0.75s faster than his previous best.
There were season-best times for Christine Ohuruogu, who was fourth in 50.69s and Shana Cox, who was seventh in 51.54s, in the women's 400m.
Marilyn Okoro came third in the women's 800m in 1:59.37, while Jemma Simpson finished sixth with another season-best of 2:00.97.
Robbie Grabarz finished second in the men's high jump on 2.36m, only losing out to winner American Jessie Williams, who jumped the same height, due to one failed attempt at 2.25m. Samson Oni came sixth with a best jump of 2.25m.
Lawrence Okoye took fifth spot in the men's discus with 63.87m.
Goldie Sayers came fifth in the women's javelin with a throw of 59.23m
Jamaican Yohan Blake, expected to be one of Usain Bolt's main rivals at this summer's Olympics, won the featured 100m race in 9.90 secs, just holding off a strong finish from Trinidad's Keston Bledman.