Monaco has made changes to its famous street circuit in the wake of Sergio Perez's high-speed crash last year. Ahead of his debut Monaco race, Mexican Perez lost control of his Sauber on the exit of...

Monaco has made changes to its famous street circuit in the wake of Sergio Perez's high-speed crash last year.

Ahead of his debut Monaco race, Mexican Perez lost control of his Sauber on the exit of the tunnel in qualifying, sustaining concussion when he hit the chicane barrier.

Perez sat out the subsequent Canadian grand prix and later admitted it had taken him most of the rest of the season to recover completely.

L'Automobile Club de Monaco, the organisers of the annual race in the Principality, have announced that the severity of the bumps on the approach to the harbour chicane have been carefully reduced ahead of late May's event.

And the 'Tecpro' wall that Perez hit has been moved back by almost 15 metres, the Spanish sports newspaper Marca added.

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