Montoya and Frentzen left to ponder big shunts

BMW-Williams ace Montoya had no-one to blame but himself after he misjudged the entry to the Swimming Pool and crashed out after three laps while running fifth behind his team mate, Ralf Schumacher.

"It is my biggest disappointment of the year so far and that is because it was a silly mistake," said the Colombian. "We were in the points at that stage, so it is very frustrating. The race was going quite well, but I was going a bit wide at that section the lap before, so I decided to leave it a bit later.

"When, I did that I lifted off into the right kerb. It was stupid and a mistake that I paid heavily for," he added.

Jordan-Honda ace Frentzen, however, says he hasn't a clue what caused his 160mph crash. He too was heading for a points finish until his car speared into the crash barriers on the exit of the tunnel on lap 49. His car slid down the hill for 100 yards and came to a halt just before the chicane.

"I don't know what happened," said the German. "From the apex onwards I understeered off in the corner in the tunnel, which is usually flat and not a problem. I have to say that I felt pretty uncomfortable as it was a very fast bit of the track. I banged my head pretty hard, but the problem is very difficult to understand until we look at the data."