Title challenger Lando Norris of McLaren has sealed pole position for Sunday’s Singapore Formula One Grand Prix. Briton Norris, battling to topple world champion and standings leader Max Verstappen, set 1 minute 29.525 seconds to just edge out the Dutchman for a sixth pole in his career. Lewis Hamilton will start third on the grid after a late burst under the floodlights on the city state’s street circuit. Ferrari’s Carlos Sainz, who won here from pole last season, crashed into the wall to prompt a red flag. He was unhurt but must start the race from 10th. Stewards then rushed to remove his ca…