• Manager pleased with team’s reaction after rivals Tottenham held to draw• Players sing ‘Happy Birthday’ to chairman before 1-0 win over SouthamptonClaudio Ranieri has praised his Leicester City players for their response under pressure as they established a seven-point lead at the top of the Premier League with victory over Southampton and moved another step towards realising a first top-flight title after a “magical” season.Leicester capitalised on Tottenham Hotspur dropping two points at Anfield on Saturday with their fifth 1-0 victory in six unbeaten games to deflate the chasing pack.