Fernando Alonso could hardly keep a straight face as he left the track after finishing second in the Italian Grand Prix.The result left the Renault driver 27 points ahead of McLaren-Mercedes rival Kimi Raikkonen of Finland, who could only manage fourth after a drama-filled race.But Alonso, 24, who can now break Emerson Fittipaldi’s record and become the youngest ever world champion in Spa in Belgium this weekend, is not getting complacent.He said: “I try not to think about championships, but for sure it’s not 100 per cent sure. If I don’t finish the next two races for example then the points are seven at Japan, so it’s really difficult. Raikkonen, 25, had a disastrous race weekend that started to go wrong in practice when he lost power and had to change an engine - the third time he has needed such a change before a qualifying session this year. This earned him a 10-place penalty on the grid, which demoted him from pole position to 11th. A frustrating race then saw him suffer a blister on his left-rear tyre which resulted in an extra pit-stop and then a late-race spin which limited him to fourth place. Despite the tough task he faces for the remaining races of the season, he is refusing to accept defeat in the hunt for the championship. He said: "The next race will show the direction the championship is going, if Alonso has a problem then we will take some points back but if he has no problem then the championship will be very difficult.“Even though my world championship chances are looking not so good I will continue to fight.”