Mo Farah ran the fastest 5,000 metres in the world this year in his first major race of the Olympic summer on Saturday.
The world champion won the Prefontaine Classic in Eugene, Oregon, crossing the line in 12 minutes 56.98 seconds.
The 29-year-old left Ethiopian Kenenisa Bekele, the Olympic champion and world record holder for the 5,000 and 10,000m, trailing in fourth place.
Farah said: "If you look at the field it was really loaded. The most important thing is to win in a class field like that. The second is to run a fast time. I am really happy with the result."