A court in Nigeria heard that the driver of a car carrying boxer Anthony Joshua was trying to pass another vehicle when the crash happened.
Two friends of the boxer died in the accident.
The driver, Adeniyi Mobolaji Kayode, is facing charges for causing death by dangerous driving and for driving without a proper licence.
He has pleaded not guilty to the charges brought against him.
The court heard details of the incident during the ongoing trial.
Further proceedings are expected as the case continues.