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Sebastian Vettel and Jenson Button have been summoned to see the stewards of the Singapore Grand Prix over an incident during a safety car period.

McLaren driver Button nearly made contact with Vettel as the Red Bull driver swerved and braked to warm up his tyres before the first restart.

"Sebastian accelerated and braked for the right hand and I didn't expect that," said Button after the race.

"There was such a speed difference. I locked up and just missed his car - which would have been embarrassing."

The duo has been called to see the stewards over the incident.

Vettel won the race from Button to take his second victory of the season.