Watch as Mbappe reaches 20mph to race past Man Utd defenders and score for PSG in Champions League
The 20-year-old gave both United men a yard head start and still outpaced them to run 31 yards in just 3.24secs
KYLIAN MBAPPE leaves Man Utd defenders trailing in his wake by reaching almost 20mph to score in their Champions League clash at Old Trafford.
The 20-year-old Frenchman used his rapid speed to find space and slot in Angel Di Maria's pin-point cross in the 60th minute.
Mbappe even gave Eric Bailly and Victor Lindelof a yard headstart in the foot race.
He reached a top speed of 19.5mph - Usain Bolt's best was 27.8mph - to cover a distance of 31 yards in just 3.24secs.
Bailly reached 18.5mph and Lindelof just 18.25mph.
Mbappe got the second goal in the 2-0 win after Presnel Kimbempe nudged home Di Maria's corner for the first.
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PSG's flight back to the French capital was delayed by an hour, however, after Mbappe was one of two players held back for drug testing.
The World Cup winner and Marco Verratti were selected for the routine test.
Thomas Tuchel's side had to wait until around 1.20am before they could begin their return journey.
Mbappe's top speed ever recorded is 25.6mph, while Utd rival Marcus Rashford has clocked 23.7mph.