The Foxes currently sit five points clear at the top of the Premier League table with four games of the season remaining.
Last weekend saw them draw 2-2 with West Ham United in a controversial affair, with the draw allowing Tottenham to close the gap by beating Stoke City on Monday.
Many feel this could be the time when Claudio Ranieri’s team’s title challenge truly unravels, especially given they also lost Jamie Vardy in the game.
Gerrard has said that that Leicester need to beat Swansea this weekend in order to send a message to Spurs that that nothing will derail them.
“Leicester City play the biggest game in their history on Sunday,” he told the Telegraph. “The visit of Swansea City will offer the greatest of insights into whether they have the stamina, nerve and depth of resources to hold off the challenge of Tottenham Hotspur.
“They must play without Jamie Vardy. If they win without him it will send a message to White Hart Lane that nothing will derail them."
Should Leicester fail to win the game and then Spurs go on to beat West Bromwich Albion on Monday, then it will certainly blow the title race wide open.
Mauricio Pochettino’s side don’t seem to have any desire to slow down any time soon, with the impressive demolition of the Potters having demonstrate their credentials.
Spurs are clearly keen to push the leaders down to the wire and the Foxes will be keen to ensure that does not happen.