1973 / World Sportscar
Feb
3
VIII Daytona 24 hours
Daytona International Speedway
Mar
25
I Vallelunga 6 hours
Autodromo Vallelunga
Apr
15
I Dijon 1000 kms
Circuit Dijon-Prenois
Apr
25
IX Monza 1000 kms
Autodromo Nazionale di Monza
May
6
VII Spa-Francorchamps 1000 kms
Circuit de Spa-Francorchamps
May
13
LVII Targa Florio
Circuito delle Madonie
May
27
XIX ADAC Nürburgring 1000 kms
Nürburgring Nordschleife
Jun
9
XLI Grand Prix des 24 heures du Mans
Circuit de la Sarthe
Jun
24
IV Österreichring 1000 kms
Österreichring
Jul
21
VI Watkins Glen 6 hours
Watkins Glen International