Danny Simpson admits the new rules clamping down on shirt-pulling and holding opponents in the penalty area are partly to blame for Leicester's sudden vulnerability at set-pieces.
Last season's stunning Premier League title success was built on a rock-solid defence, with centre-backs Wes Morgan and Robert Huth dominant in their own box.
But Leicester conceded from three corners in the first half at Old Trafford – including two headers by Chris Smalling and Paul Pogba – and former Manchester United defender Simpson believes the new rules have had an effect on how they approach set-pieces.
'It is in your mind,' said Simpson.