Jules Bianchi crash a stark reminder of dangers, says Kubica

Jules Bianchi remains in a critical but stable condition with severe head injuries after his crash in Japan

Former F1 driver Robert Kubica says Jules Bianchi's Japanese Grand Prix crash serves as a reminder that the sport can never be made 100% safe.

Bianchi lost control in wet conditions and collided with a recovery vehicle at Suzuka, suffering severe head injuries.

Kubica, 29, who suffered a partially severed right hand in a rally accident in 2011, told BBC Sport: "When you see it, you ask how is this possible?

"But unfortunately, it can happen. There is always risk in motorsport."

Kubica pointed to the 2007 rain-hit European Grand Prix at the Nurburgring as an example of how Formula 1 can be about fine margins.

Tonio Liuzzi lost control of his Toro Rosso on the run down to the first corner, spinning and almost hitting the safety car before lightly bumping into a tractor, which was en-route to rescue several other stricken cars who had gone off moments earlier. Liuzzi was unhurt.

"He was OK and nobody noticed it might be dangerous," he said. "The FIA [world motorsport's governing body] has done an amazing job to improve things and it shows there are still things to improve.

"But it also shows that there is always a danger - that's part of the sport. Even if you think it is safe, the danger is always there."

Kubica was involved in a violent accident in 2007 when he crashed his BMW Sauber at 180mph in the Canadian Grand Prix, experiencing a deceleration force of 28G.

The Pole hit a concrete wall in the middle of the hairpin before rolling back across the track into the barriers on the other side.

Kubica suffered a sprained ankle and light concussion in his 180mph crash at the 2007 Canadian GP

He escaped with light concussion and a sprained ankle and returned the following year to claim victory at the same track - his first and only F1 triumph.

Kubica, who now competes in the World Rally Championship with M-Sport but has not recovered enough movement in his arm to return to F1, added: "We can forget how motorsport can be dangerous.

"My case is not the same but I was quite unlucky and lucky - you can see it both ways. I wish Jules and his family all the best and I pray for him.

"I know him quite well, he's a really nice guy and his talent is high, but it doesn't matter how much talent he has or if he is a friend or not - the danger remains."