Red Bull director Helmut Marko has refused to be drawn on rumours that the reigning F1 world champions have a major upgrade in the pipeline. The Bulls dominated the first race of the season in Bahrain, with Max Verstappen taking pole position before leading home Sergio Perez in a 1-2. And in an ominous sign for the paddock, there’s already talk that they’re plotting to make big improvements to their car for the Emilia Romagna Grand Prix. F1 will roll into Imola in May for the first European race of the season after stopping off in Saudi Arabia, Australia, Japan, China and Miami. Red Bull’s riv…
