Alonso undergoes jaw surgery after road accident 23dLaurence Edmondson 29dLaurence Edmondson and Nate Saunders Fernando Alonso is set to return to F1 racing duty this season. James Moy Photography/Getty Images Two-time Formula One world champion Fernando Alonso has undergone corrective surgery on his jaw after being involved in a road traffic accident on Thursday. Alonso was knocked off his bike while cycling in Switzerland. Alonso is set to return to F1 with Renault's rebranded team, Alpine, this season, which starts with preseason testing in Bahrain on March 12. On Friday, Alpine confirmed he sustained a fractured upper jaw in the accident. The surgery was a success and the Spaniard will be kept under observation for a further 48 hours.