Justin Gatlin won the 100m race in the year's final Diamond League meeting in Brussels to be crowned overall champion.
The American won in a time of 9.98 seconds, with Nigerian-born Qatari Femi Ogunode finishing second on the same time, and Frenchman Jimmy Vicaut claiming third in 9.99.
Gatlin has enjoyed a strong season in 2015, posting personal bests in the 100m and 200m, though he could not topple Usain Bolt at the World Championships this past August.
Bolt was not participating in Brussels, having opted to end his season with his winning runs in Beijing.
In the men's 200m, Ogunode claimed the victory after Gatlin decided to withdraw from the race, winning in a time of 19.97.
Antigua's Miguel Francis (20.22) and Jamaican Rasheed Dwyer (20.27) finished second and third.
In other results, 200m world champion Dafne Schippers beat Olympic champion Allyson Felix, winning in a time of 22.12.