(ANSA) - Rome, October 11 - Fernando Alonso said on Thursday that Ferrari just need to give more of the same, even though his championship lead has been whittled down to just four points. The Spaniard was forced out on the first lap of last weekend's Japanese Grand Prix by a shunt from Kimi Raikkonen's Lotus, which enabled the race winner, Red Bull's world champion Sebastian Vettel, to virtually close the gap. Alonso, who won the 2005 and 2006 world titles with Renault, also had to retire through no fault of his own at the Belgian Grand Prix last month because of a huge crash caused by Lotus's Romain Grosjean. "I think we have been pushing from the first test in the winter, so nothing has changed in the last five races," Alonso told a press conference ahead of Sunday's South Korean Grand Prix. "We just need to keep doing the things we've been doing so far. I think it has nearly been a perfect championship for us at the moment, with good strategies, good starts, good approach to the races. "Everything we had in our hands on Sunday we maximised the points. We had one zero in Spa (Belgium) and one zero in Suzuka (Japan) but things completely outside of our team, so apart from that we don't need to change too many things".