George Russell to start from back of grid at Singapore Grand Prix after engine penalty

Mercedes driver George Russell will start Sunday's Singapore Grand Prix from the back of the grid after a power-unit penalty following his engine failure in Bahrain.

• Russell retired from third place in last Sunday's Bahrain Grand Prix after an engine failure with five laps remaining.
• Mercedes confirmed Russell requires a new power unit, exceeding his seasonal quota and triggering the back-of-grid penalty for Sunday's race.
• Team principal Toto Wolff said the team will evaluate both its latest update package and previous specification to understand its performance.
• Team-mate Kimi Antonelli leads Russell by 84 points in the championship standings.