Ask4sports.com project 'world's fastest football sprints' tests running speed in real match conditions from video highlights. With your efforts and thorough internet search, the fastest sprints in the history of football were gathered here (see comments) and some first results are listed below. Note that not all players are tested yet! Keep in mind that results have approximate values due to not standardized conditions and low video quality.
ESTIMATION OF TOP RUNNING SPEED (ASK4SPORTS.COM):
(Don't be confused with Usain Bolt's speed in the WR 100m race. Read more here).
1. FRA Thierry Henry: 10.9m/s (24.4mph, 39.2km/h) 1998
-. POR Cristiano Ronaldo: 10.9m/s (24.4mph, 39.2km/h) 2011
2. POR Cristiano Ronaldo: 10.4m/s (23.3mph, 37.5km/h) 2010
-. ENG Theo Walcott: 10.4m/s (23.3mph, 37.5km/h) 2010
-. ENG Theo Walcott: 10.4m/s (23.3mph, 37.5km/h) 2011
-. ENG Gabriel Agbonlahor: 10.4m/s (23.3mph, 37.5km/h) 2009
3. WAL Gareth Bale: 10.2m/s (22.9mph, 36.8km/h) 2010
4. ENG Aaron Lennon: 10.1m/s (22.6mph, 36.4km/h) 2011
-. CAM Samuel Eto'o: 10.1m/s (22.6mph, 36.4km/h) 2008
-. NED Ryan Babel: 10.1m/s (22.6mph, 36.4km/h) 2008
5. ENG Aaron Lennon: 9.9m/s (22.2mph, 35.7km/h) 2009
6. FRA Franck Ribery: 9.7m/s (21.7mph, 35.0km/h) 2006
-. ENG Wayne Rooney: 9.7m/s (21.7mph, 35.0km/h) 2010
-. FRA Jonathan Biabiany: 9.7m/s (21.7mph, 35.0km/h) 2010
-. NIG Obafemi Martins: 9.7m/s (21.7mph, 35.0km/h) 2011
-. ENG Ashley Young: 9.7m/s (21.7mph, 35.0km/h) 2011
7. BRA Ronaldo: 9.6m/s (21.4mph, 34.6km/h) 2005
-. ENG Aaron Lennon: 9.6m/s (21.4mph, 34.6km/h) 2010
-. ENG Micah Richards: 9.6m/s (21.4mph, 34.6km/h) 2011
8. ARG Lionel Messi: 9.4m/s (21.1mph, 33.8km/h) 2008
-. BRA Alexandre Pato: 9.4m/s (21.1mph, 33.8km/h) 2011
-. ENG Aaron Lennon: 9.4m/s (21.1mph, 33.8km/h) 2010
-. NED Eljero Elia: 9.4m/s (21.1mph, 33.8km/h) 2009
9. ENG Michael Owen: 9.3m/s (20.8mph, 33.5km/h) 1998
-. NED Arjen Robben: 9.3m/s (20.7mph, 33.3km/h) 2010
10. ITA Ignazio Abate: 9.2m/s (20.6mph, 33.2km/h) 2008
-. POL Zbigniew Boniek: 9.2m/s (20.6mph, 33.2km/h) 1984
-. ECU Joffre Guerron: 9.2m/s (20.5mph, 33.1km/h) 2008
11. GER David Odonkor: 9.1m/s (21.4mph, 32.8km/h) 2006
-. FRA Gael Clichy: 9.1m/s (20.4mph, 32.8km/h) 2007
12. BRA Alexandre Pato: 8.8m/s (19.7mph, 31.7km/h) 2008
13. POR Cristiano Ronaldo: 8.7m/s (19.5mph, 31.3km/h) 2009
14. ENG Shaun Wright-Phillips: 8.7m/s (19.5mph, 31.3km/h) 2011
15. BRA Roberto Carlos: 8.4m/s (18.7mph, 30.1km/h) 2007