Renault team boss Eric Boullier has played down calls for the Drag Reduction System to be banned in the Monaco tunnel during this weekend's event.

Although drivers will only be able to use the system in the designated DRS zone on the start-finish straight during the race itself, there is no restriction on DRS usage in either free practice or qualifying.

Concerns had been raised about the usage of DRS on the Monaco streets before the FIA confirmed the system wouldn't be banned, although reports have suggested that question marks remained about whether or not DRS would be permitted through the tunnel.

However, Boullier insists that there is no need for the system to be banned through the tunnel, with it down to the drivers on track to decide whether or not opening the rear wing is too risky

"The concern about DRS usage in Monaco is focussed on its potential use in the tunnel," he said. "This will not be a factor in the race, as the DRS sector will be on the main straight only. However, in Free Practice and Qualifying, DRS use is unrestricted. The teams will therefore attempt to use the wing as much as possible around the lap. There will be some places where it will be possible to use without difficulty, and other places where the drivers will not feel confident.

"In this respect it is identical to every other track this so far this season - the driver has to judge where he can safely activate the DRS. All attention is focussed on the tunnel, as there will be a good lap time benefit for using the DRS here if the car can manage it. Some feel that the incentive to benefit will force drivers to take unnecessary risks.

"My own view is that the drivers will build up their confidence gradually during free practise and by the time qualifying arrives they will know in how much of the tunnel they can safely use the DRS wing. Often in the past the tunnel has been very tricky to take flat out at the start of the race weekend when the track is poor. This has not caused the drivers to crash, they have simply built up their pace gradually until they were confident that it could be taken flat - I think the same approach will emerge with the DRS."



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