Red Bull Racing boss Christian Horner says Formula 1 could risk "saturation" if its calendar is extended beyond its current 21-race schedule, with the teams struggling to carry the burden of an expansion. Ever since it took over Grand Prix racing at the end of 2016, commercial rights holder Liberty Media has spoken of its ambition of widening F1's presence around the globe. Efforts are underway to add a second race in the US and in China, while Vietnam will appear on the docket in 2020. However, new additions to the calendar could be to the detriment of existing races in Spain, Germany or Mexico where contracts have yet to be renewed. Horner pleads for changes to Friday penalties...
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