20 laps after switching, the tyre on the left front started to have graining.
Mercedes then decided to tell Hamilton to keep the tyre management up, in order to finish the race.
Verstappen, who was on the harder compound, kept on pressuring Hamilton after being allowed to put the car in a faster mode.
20 laps from the end, his front tyres had 0% rubber left, resulting in massive understeer on the slow corners.
2 laps before the finishing, Verstappen made 1 last desperate overtake, but failed, allowing Hamilton to finish the race 1st.
"for more detais, here's a video"