Carlos Sainz says his approach of slowing down the cars behind to prevent them being able to get a strategic advantage over him “worked to perfection” as he won the Singapore Grand Prix. Mercedes saved two sets of mediums tires for its drivers to open up pit stop options in case of safety car interruptions at Marina Bay, but Sainz bunched up the field to prevent gaps opening up to pit into. In the end, George Russell and Lewis Hamilton took the opportunity to make a second stop during a Virtual Safety Car but Sainz kept Lando Norris between himself…