Jules Bianchi died at the age of 25 on Friday night as a result of head injuries sustained at last October's Japanese Grand Prix.
He "fought right to the very end", his family said in a statement, before his battle came to an end in hospital in Nice.
Here, Press Association Sport looks at some of the tributes paid to the 25-year-old Frenchman on Twitter on Saturday.
McLaren driver Jenson Button: "Last night we lost a truly great guy and a real fighter #RIPJules my sincerest Condolences to his family and friends."
Red Bull driver Daniel Ricciardo: " I'll never forget you and the good times we had. Going to miss you bro."
Lotus driver Romain Grosjean: " Yesterday we lost one of the best guys and best drivers I've ever met. I'll miss you so much my friend. #RIPJules"
Williams driver Valtteri Bottas: " Woke up to these very sad news RIP Jules. You will be never forgotten. My thoughts are with the family."
British driver Max Chilton: ''No words can describe what his family & the sport have lost. All I can say it was a pleasure knowing & racing you.''
Former F1 driver and Le Mans winner Mark Blundell: "Very sad news hearing the passing of Jules Bianchi. Thoughts are with his family & friends. #RIP #Fighter #LiveForNow"
MotoGP rider Dani Pedrosa: " All my thoughts to the family of Jules Bianchi,R.I.P."
Racing driver Bruno Senna, nephew of the late three-time F1 champion Ayrton Senna: " My strong thoughts go to Jules Bianchi's family! Hope the lessons we learned will stop more tragedies like these from happening! RIP"
Mario Andretti, the 1978 F1 world champion: ''My heartfelt condolences to the Jules_Bianchi family for this very sad ending of a promising young life. My prayers are with you. RIPJules.''
Dario Franchitti, the four-time Indy Car Series champion and three-time Indy 500 winner: ''Rest in peace Jules Bianchi. This sport that we love can be very cruel.''
Former F1 driver Allan McNish: "Sad to wake to the news @Jules_Bianchi has passed away last night. Thoughts are with his family and close friends today. #lightacandle"
Indianapolis 500 champion and former F1 driver Juan Pablo Montoya: ''Just heard that Jules Bianchi passed away. Thoughts and prayers for his family and friends. RIP.''
Former F1 driver Kamui Kobayashi: ''We never forget you!''
Three-time Le Mans winner Andre Lotterer: ''Rest in peace dear Jules! We lost a great fighter today. All my thoughts are with you and your family Jules_Bianchi''.
British auto racing driver Katherine Legge: ''So sad to hear Jules Bianchi passed away. RIP Jules.''
Source: PA
