Fernando Alonso will spend a night in hospital after suffering a concussion in an accident on the final day of pre-season testing at the Circuit de Catalunya.

Alonso crashed on the exit of turn three whilst on a relatively slow out-lap shortly before lunchtime, the Spaniard's McLaren-Honda making a hefty impact against the inside wall side-on.

Needing assistance out of the car, Alonso was initially checked by on-site staff in the medical centre before he was airlifted to hospital for further analysis, as well as an MRI and CT scan.

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McLaren-Honda has since confirmed that Alonso is 'uninjured', but the concussion he suffered means he will require a stay in hospital overnight. Furthermore, racing director Eric Boullier has criticised the 'exaggeration' of some media reports speculating that he may have potentially 'fainted' or 'blacked-out' prior to the crash.

"Fernando's accident was just one of those things that happens in testing," Boullier said. "Fortunately, he's fine, but was concussed during the accident, which therefore required an overnight stay in hospital as a precaution. That's normal practice after a concussion. Inevitably, some media reports have sought to exaggerate the severity of the incident - it was just a normal testing accident."

Opting not to send out Jenson Button in the car during the afternoon as originally planned, Boullier says the team - which only managed a further 124 laps over the four days - will regroup and return for the third and final test looking to make headway before it heads on to the Australian Grand Prix opener.

"While the car wasn't particularly badly damaged, it was enough of an impact to warrant quite a lengthy check of the gearbox and power unit systems. Given the time needed to carry out such an analysis, we decided to bring the curtain down on our test a few hours earlier than anticipated.

"It's been a tough week for the whole team, but we'll be back, and pushing harder than ever, in Barcelona next week."