ROME., October 20, 1997 (AFP) - Ferrari team chief Jean Todt said on Monday that Michael Schumacher's chance to win the world title this weekend was all down to his teammate Eddie Irvine. Ferrari are working flat out to help Schumacher protect his one point lead over Williams rival Jacques Villeneuve, as they head into this weekend's last race of the season at Jerez in Spain. "This is a very important week. We can't work miracles, even though we are preparing really well for this last race," Todt said. "However, it would be a mistake to start celebrating now, before we know the final result." The Frenchman, speaking on Italian radio, then singled out Schumacher's Irish teammate for special praise. "A tribute has to go to Irvine," Todt explained, "because if we're in this situation now, it's thanks to him and the fantas- tic race he drove at Suzuka." Irvine guided Schumacher into first place in Japan, sacrific- ing his race lead to put the German in line for his third world title. Though most of Ferrari's energies are devoted to the last act of the 1997 season, Todt also revealed that their new car for the 1998 world championship would be ready by the end of the year. Todt said: "We're hoping that the new car will be able to race in practice before Christmas."