LAS VEGAS : Ferrari boss Fred Vasseur said the sudden departure of Formula One race director Nils Wittich was strange ahead of title-deciding grands prix. Both championships are still to be won, with Red Bull's Max Verstappen on the brink of clinching his fourth in a row but the constructors' battle more open between leaders McLaren and Ferrari. Wittich's departure, with immediate effect, was announced last week with plenty of speculation but little explanation of why he left. Drivers had