Romain Grosjean has apologised to Lotus after crashing out of second practice in Monaco.
The Frenchman was starting a qualifying simulation when he made an error at Sainte Devote and hit the barrier.
The accident forced him out of the remainder of the session, but he nonetheless finished in seventh place.
"After a great start to the day it was a real shame to end things early. I didn’t have the grip I expected going into the corner, but there was nothing wrong with the car; my braking and entry speed were all wrong and I ended up hitting the barrier," he said.
"There was no chance to let off and go straight on into the runoff area; I was committed to the corner so that was it."
The Frenchman is remaining confident as his time, good enough for seventh, was set on the prime tyres.
"We have a very good car here and it gives you the confidence to push, but unfortunately I pushed a bit too hard. I’m sorry for the team and I definitely owe them all a drink for all the work that’s needed before Saturday. The grid looks very close, but we seem in good shape and I’m eager to get back out on track and fight for the top positions."