Diogo Jota is thought to have been driving when he and his brother Andre Silva died in a car crash last week, Spanish police have said.
The Liverpool player and father-of-three was killed alongside his brother, also a footballer, after the Lamborghini they were travelling in burst into flames following a suspected tyre blowout in the early hours of last Thursday in Zamora, Spain.
A spokesperson for the Guardia Civil of Zamora told the PA news agency that tests being carried out by its traffic division showed Jota was driving the car at the time.
The spokesperson added that the car was thought to be travelling above the speed limit on the road, which local media report is 120kmph.
The spokesperson said: "The expert report is being carried out and finished, where among other things they are studying the marks (tread) left by one of the wheels of the vehicle.
"Everything also points to a possible high excess of speed over the permitted speed of the road.
"All the tests carried out for the moment point to the fact that the driver of the vehicle was Diogo Jota."
The report has not yet been finalised but will be handed over to the court in the town of Puebla de Sanabria, Zamora.
Jota and his brother were found dead after the car crashed on the A-52 in Palacios de Sanabria near the city of Zamora at 12.40am on Thursday.
Pictures of the aftermath of the crash showed debris scattered along the side of the road including what appeared to be charred parts of the vehicle.
Footballers, family and fans gathered for the funeral of the brothers, which took place in their native Portugal on Saturday.
Meanwhile Liverpool's players have reported back for pre-season training at the club's AXA Training Centre.
Some of Arne Slot's squad had been scheduled to return for pre-season training on Friday, but the club delayed their return following the accident.
Mohamed Salah, Andy Robertson, Conor Bradley and Wataru Endo were among the players pictured arriving at the training ground.
Liverpool's first pre-season friendly is scheduled for Sunday against Preston at Deepdale, but the Premier League champions have yet to announce whether the game will go ahead.
The Reds, who will play FA Cup winners Crystal Palace in the Community Shield on 10 August, are also scheduled to face AC Milan in Hong Kong and J1 League side Yokohama in Japan at the end of this month.