Ferrari introduced their F2005 at the last race in Bahrain, advancing its debut in response to Renault's domination
The McLaren driver will miss Sunday's Bahrain Grand Prix after sustaining a hairline crack in his shoulder while playing tennis.
Ferrari chief desigener Rory Bryne said the F1 champions would start next season with an interim version of their F2004 car.
Italy's Imola circuit will host grands prix for at least another five years, local officials said on Monday after meeting Formula One supremo Bernie Ecclestone.
"If we do away with races like France and Britain, we start to lose an essential element of the sport," the FIA president said.
Germany's Ralf Schumacher earned plaudits after putting Williams back on the podium in his penultimate race.
The McLaren driver has called for a re-think on rules that allow the bottom six teams to run a third car on Fridays at Grand Prix weekends.
The world champion was 1.4 seconds faster than Jenson Button in Friday's practice for the Spanish Grand Prix.
But BAR are aiming to finish the Formula One championship as runners-up to Ferrari, according to technical director Geoff Willis.
Ferrari have added Jenson Button's name to their list of candidates to take over from world champion Michael Schumacher.
Michael Schumacher of Germany, driving a Ferrari, has won the San Marino Formula One Grand Prix.
Formula One supremo Bernie Ecclestone said earlier in the year that the circuit near Bologna, which is looking for government funding to upgrade the facilities, would be making its final appearance on the calendar this season.
Honda's Otmar Szafnauer said Imola represented the first of several significant steps planned by BAR's Japanese engine partner this season.
Briton Jenson Button looked a threat to the Ferrari with the second best lap in both 45 minute sessions. \n\n
McLaren struggled, with Kimi Raikkonen eighth fastest and David Coulthard 11th in Friday's first practice for the San Marino Grand Prix.
Team mate Damon Hill rejected suggestions that the modified steering column on Ayrton Senna's Williams had snapped.
Ferrari said Schumacher lapped the Italian circuit named after team founder Enzo Ferrari and son Dino in one minute 19.664 seconds.
Germany broke Austrian hearts with a last-gasp win in Vienna on Friday, extending their perfect start to Euro 2012 qualifying on a night of far more serene progress for Italy and frustration for France.
Ferrari's Michael Schumacher can win a record sixth Formula One championship at Indianapolis on Sunday if circumstances go his way.
They attended a discreet ceremony, with a few relatives and no public, in the small western German town of Kerpen.
"My mother and father made it possible to do what we do and she would have wanted that we did this race today."
She had slipped into a coma following a fall at her home last Saturday and underwent an emergency operation.
Race stewards, meeting in Paris, awarded the Jordan driver a first career win and demoted McLaren's Kimi Raikkonen to second place following a timing discrepancy.
The world champ gave Ferrari's new F1 car a record-breaking track debut on Tuesday.