In 1973, Matra which had previously focused on Le Mans also challenged for the championship while Alfa was absent. As Matra won several races, Ferrari needed to enter in the 1973 24 Hours of Le Mans, with an improved yet still doubtful engine. One car was used as a "hare" which supposed to lure the Matras into driving faster laps than they intended, to test their reliability. Ironically it was only the "hare" Ferrari which survived the 24 hours, finishing a respectable second behind a Matra. The championship saw the same order, with only two Italian wins compared to five French. In addition, despite the absence of the Matras, the 312 PB could not defend the 1972 win of the Targa Florio as the prototypes of Ferrari and Alfas failed and a Porsche 911 collected a surprise win.