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Lewis Hamilton feels it is time "to go back to the drawing board" in the wake of his latest disappointment.
Hamilton again endured a feeling he dislikes more than any other in a race as he went "backwards" in Monaco on Sunday, finishing fifth after starting from third, ending up four seconds behind winner Mark Webber.
The Australian, claiming the eighth win of his career and second in three years around the streets of the principality, backed up the field over the closing laps as drizzle fell in places.
It resulted in Webber finishing 0.643secs ahead of Mercedes' Nico Rosberg who was followed closely by Ferrari's Fernando Alonso and Red Bull team-mate Sebastian Vettel.
The result leaves Hamilton 13 points adrift of Alonso and 10 down on Vettel and Webber because remarkably, with a new F1 record of six winners in the first six races, he has yet to be one of them.
Hamilton said: "The team definitely have some work to do.
"I've fallen behind. Race by race we are getting further and further behind the others.
"I'm still there, but we are falling behind bit by bit, and I've lost a lot of points. We have to focus on trying not to lose any more from now on.
"I have to go back to the drawing board, find out where we are losing time and work on that.
"It's tough for us, but we will keep pushing, keep fighting."
Hamilton admitted his start was not one of the best, with the 27-year-old just avoiding behind him the early chaos when Lotus' Romain Grosjean collided with Michael Schumacher in his Mercedes, sending the former spinning out.
After that, a slow pit stop in comparison to that of Alonso and Vettel resulted in him losing the two places prior to the train-like conclusion to a race in which there was minimal overtaking.
"It wasn't frustrating, but it wasn't the best result," said Hamilton.
"I don't know how long my pit stop was, it was quite a long time, but I wasn't able to keep up with Alonso, and then Sebastian got me in his pit stop. After that it was impossible to overtake.
"I really dislike going backwards, but nonetheless we came away with some points and there are many more races ahead of us, so we have to try and keep our heads up."
Bizarrely, Hamilton bemoaned an unusual occurrence in which the numbers on the pit boards that provide drivers with information as to their position and laps remaining, fell on him during the race.
"It was strange," said Hamilton.
"All the guys holding pitboards, particularly at the beginning coming out of the last corner, about two or three of the slips fell out and hit me in the front of my helmet.
"I don't know if it happened to anyone else, but I was like 'this is getting ridiculous', and they kept dropping them and dropping them, and there was some on the floor.
"I was saying 'someone do something about it' because my visor was getting worse and worse. They need to do a better job in securing those."