Ferrari's Sebastian Vettel refused to blame his team for a wrong strategy call after the four time World Champion missed out on an elusive first win of the Formula One season in Sunday's Canadian Grand Prix.
The German, Canadian and Brazilian grands prix were listed as subject to confirmation on a record-equalling 21-race provisional calendar for 2017 published by Formula One's governing body on Wednesday.
The 2019 Formula One world championship starts on March 17 with 21 races in a season that ends later than any since 1963.
Triple world champion Lewis Hamilton produced a moment of Montreal magic on Saturday to put his Mercedes on pole position for the Canadian Grand Prix and equal Ayrton Senna's career haul of 65.
Quadruple Formula One world champion Sebastian Vettel went for five on Friday with the German choosing to have that numeral on his car when he is eventually deposed as number one.
Formula One is to award double points for the last race of the season in a controversial attempt to keep championships undecided to the very end after four years of Red Bull domination.
The Sahara Force India celebrated its 100th race in style, scoring seven points with Paul Di Resta and Adrian Sutil finishing in seventh and 10th places respectively at the Canadian Grand Prix in Montreal.