13 week of 1988

Circuit/Rally	Championship	Date	Winers	Chassis
Autodromo Nazionale di Monza	Swiss Formula Three Championship	1988.04.03	Jakob Bordoli	Martini Mk52 - Volkswagen
Castiglione del Lago	Motocrossowe Mistrzostwa Świata 125cc	1988.04.03	Jean-Michel Bayle	Honda
Circuit de la Sarthe	FIM Endurance World Championship	1988.04.03	Christophe Bouheben Alex Vieira Jean-Michel Mattioli	Honda
Donington Park	Superbike World Championship	1988.04.03	Davide Tardozzi	Bimota YB4EI
Donington Park	Superbike World Championship	1988.04.03	Marco Lucchinelli	Ducati 851
Jacarepaguá	Formula One World Championship	1988.04.03	Alain Prost	McLaren MP4/4 - Honda
Magione	Italian Formula 3 Championship	1988.04.01	Mauro Martini	Dallara - Alfa Romeo
Magione	Italian Formula 3 Championship	Italian Superturismo Championship	1988.04.03	Gianfranco Brancatelli	Alfa Romeo 75 Turbo
Misano World Circuit Marco Simoncelli	Italian Formula 3 Championship	1988.04.02	Mauro Martini	Dallara - Alfa Romeo
Oulton Park	Italian Formula 3 Championship	British Touring Car Championship (BTCC)	1988.04.01	Andy Rouse	Ford Sierra RS 500 - Cosworth
Oulton Park	Brytyjska Formuła Ford	1988.04.01	Vincenzo Sospiri	Van Diemen RF88 - Ford
Tsukuba	All-Japan Formula 3	1988.04.03	Maurizio Sandro Sala	Ralt RT31 - Nissan
Zolder	Niemiecka Formuła 3	1988.04.03	Joachim Winkelhock	Reynard 883 - Volkswagen