Speed is key in modern rugby.
Whether it be defenders recovering to win a last-ditch tackle or attackers hitting teams on the counter, we are constantly told that 'there is no substitute for pace'.
Check out the top 10 from the Gallagher Premiership below, according to their top speed from the last 12 months.
10. Semi Radradra (Bristol Bears) - 19.08mph
9. Adam Radwan (Newcastle Falcons) - 19.12mph
8. Anthony Watson (Bath Rugby) - 19.95mph
7. Ratu Naulago (Bristol Bears) - 20.91mph
6. Ollie Thorley (Gloucester Rugby) - 21mph
5. Charles Piutau (Bristol Bears) - 21.47
4. Joe Cokanasiga (Bath Rugby) - 22.36mph
3. Louis Rees-Zammit (Gloucester Rugby) - 22.59mph
2. Stuart Hogg (Exeter Chiefs) - 22.86mph
1. Jonny May (Gloucester Rugby) - 23.5mph