#4 Viktor Axelsen - 404 kmph
The young Dane has taken huge strides in the world of badminton. Still 23 years old, Axelsen is the current men's singles World Champion and 2016 Rio Olympics bronze medalist. He has quickly overtaken compatriot Jan O Jorgensen as the successor to the legendary Peter Gade that Denmark has been waiting for.
Axelsen is popular for his quick-thinking, court coverage and trick-shots. His smashes are also equally powerful, however, and he often summons them to finish rallies. One such moment came at the 2015 Japan Open (yes, the same tournament). The Dane produced a 404 kmph smash that left everyone stunned. Though Axelsen lost in the final of the competition to Lin Dan, he made sure he beat the Chinese in one aspect.