Jenson Button said a "pretty messy day" has left him on the back foot following Friday practice for the Abu Dhabi Grand Prix.

Both practice sessions saw Button hit trouble, with his running ended prematurely in FP1 due to a suspension issue, with McLaren then noticing a hydraulic issue which kept him in the garage for the first half of FP2. Asked if he can make up for the lost mileage in FP3, Button replied: "Not really, it's gone isn't it?

"It was tricky this morning; an issue with the rear suspension and then a hydraulic issue which kept me out of most of the session. We even had an issue inside the cockpit at one point in the day so I had to get back out of the car and back in. So it's been a pretty messy day and obviously because of all the work that's been going on the car is not set down as we expected it to be, looking at it now.

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"It's a slight relief in a way because the balance isn't where I hoped it would be. So a lot of work to do overnight and I think over one lap the car doesn't seem to be bad but looking at the lap times of the long runs it's tricky out there."

With team-mate Kevin Magnussen third quickest in FP2 in the updated McLaren - new parts which Button will get on Saturday - Button said it masked problems with the car's race pace.

"I think Kevin's lap was good, whether that will be the case tomorrow I don't know. The one lap pace is OK. It's only Friday, there's a lot of work needed for the long runs for consistency and looking after the tyres because we seem to be struggling compared to our competitors out there. On my side of things it's a little trickier but hopefully we can put the car right overnight."