Former F1 driver Alex Zanardi remains in a serious but stable condition in intensive care after a handbike accident in Italy. Zanardi was airlifted to Siena's Santa Maria alle Scotte hospital on Friday after he sustained head injuries and underwent a near three-hour operation.

An update from the hospital on Sunday morning confirmed the 53-year-old was still under sedation, intubated and breathing with the help of a ventilator. "The current conditions of general stability still do not allow us to exclude the possibility of adverse events," the hospital said in a statement. Zanardi had both legs amputated after crashing in the American Memorial 500 Cart race at Lausitz, Germany, in September 2001.