Jorge Lorenzo has admitted the decision to fit a softer front tyre to his Yamaha for the Czech Republic Grand Prix at Brno was his undoing as he missed the podium for only the third time this year.

The Spaniard, who qualified second on the grid ahead of title rival Casey Stoner, had hoped the gamble would give him the edge over the Hondas, but while he made good progress early on - save for an impressive save at turn one -, he floundered as the race continued.

Eventually bumped down to fourth place, Lorenzo concedes the different conditions on race day prevented him from getting the same 'good feeling' as he did during practice and qualifying.

"The front tyre we chose was not the best option. We tried it in qualifying and it gave me a really good feeling and very constant pace. With the different conditions and temperature it was not working. From the beginning of the second lap I was really close to losing my front in every corner so it was difficult to improve on fourth position.

"The Championship is now even more difficult for us but that doesn't mean it is finished. There are still a lot of points to be played for so we must focus on winning the most races we can.

"Now we must forget this race which is probably one of the worst this season and possibly in my MotoGP career, I am excited to try the 1000 bike and improvements to the current 800 engine tomorrow as well!"