In pictures: resurfaced areas of Sochi Autodrom for 2021 Russian Grand Prix. Resurfaced areas of Sochi Autodrom.

Resurfaced areas of Sochi Autodrom ahead of the 2021 Russian Grand Prix:

Fast lane at pitlane:

Patch at T2:

Full T15:

Patch between T16 and T17:

Image source: @AlbertFabrega