De Angelis remains in intensive care in Dokkyo Hospital in Mibu in Japan, having sustaining head, lung, rib and spinal injuries when his Ioda Aprilia hit an unprotected guardrail on the exit of Turn 9 in fourth practice for last weekend’s Japanese Grand Prix.

Valentino Rossi admitted de Angelis had crashed in an unusual spot, but said the proximity of the barriers to the track was still a concern.

“Alex crashed in a place where it is very difficult to expect a hard crash,” he said.

“He want to the inside on the exit of a corner. Usually we are concerned with the outside.

“With this type of bike and this amount of power, sometimes it is difficult to understand where the bike will go.

“Motegi’s guardrails are very close. Where Pol Espargaro crashed [in the race] was also very dangerous.

“Tomorrow we will speak with the other riders. In a normal way, Motegi is quite safe but there are some points that can be dangerous.”

Ducati rider Andrea Dovizioso acknowledged that absolute safety at MotoGP tracks was probably an unachievable goal.

“For us it’s impossible to have a completely, 100 per cent safe track. We need four times the space,” he said.

“There is always a margin to improve. Where de Angelis crashed, there are a lot of points like this at every track.”