Mercedes under-delivered at the season-opening Bahrain Grand Prix on Saturday, Sky Germany pundit Ralf Schumacher says. The Silver Arrows, who have won eight constructors’ championships during their history in Formula 1, only scored 16 points under the lights. Schumacher says he ‘expected more’ from the Brackley outfit, who had topped FP2 with Lewis Hamilton and qualified third with George Russell. Russell briefly threatened to be Max Verstappen’s closest challenger after overtaking Charles Leclerc early in the race but he subsequently lost three places. Sergio Perez and Carlos Sainz got past …