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Former Mercedes star Nico Rosberg is 'still not sure' if George Russell will be able to compete with Lewis Hamilton at the Silver Arrows. The 2016 champion claimed we are yet to see a 'spark of absolute brilliance' from Russell across his first three races for his new team.

Rosberg has also raised fears Russell may not be able to reach the level needed to challenge for world championships once Hamilton inevitably retires. Speaking to Sky Sports F1, he said: "It's not an easy situation.

"They were expecting to fight for race wins and now suddenly they're very far behind from the other guys and they have a difficult car so that's a bit of a setback and a tough situation for George to enter into. Nevertheless, the first three races he's done really well. He's been very close to Lewis as we see him second in the championship.

"He's really maximised all the points possible in the first three races so