Jamie Vardy inspired Leicester to a nervy Europa League victory at AEK Athens with the 33-year-old becoming the Foxes' oldest European goalscorer after netting from the spot last night.
Hamza Choudhury's strike also helped Leicester maintain their 100 per cent start to Group G.
Muamer Tankovic netted after the break to make it an anxious evening before missing a golden chance to make it 2-2.
Cengiz Under hit the bar but the Foxes survived an improved second-half show from the hosts.
They remain joint top with Braga, who beat Zorya Luhansk, with the Portuguese side travelling to the King Power Stadium next week.
James Maddison drove wide from the edge of the area before Brendan Rodgers' side got the breakthrough after 18 minutes.
Maddison slipped Vardy into the area and he was clattered by onrushing Panagiotis Tsintotas.
The striker picked himself up to score from the spot and beat Tsintotas with pure power, the 'keeper getting two hands to the ball.
AEK had lost just once in their previous 23 home games, but Leicester pushed for a second as Tsintotas blocked Under's shot.
Yet Kasper Schmeichel needed to be alert to deny Livaja a leveller after 27 minutes.
Leicester, without the injured Tim Castagne and Jonny Evans, occasionally looked fragile at the back, but still doubled their lead six minutes before the break.
Tsintotas spilled Marc Albrighton's cross behind and Choudhury was left unmarked at the far post to fire in Maddison's corner.
AEK pulled one back after the restart when Tankovic latched on to Mandalos' fine pass and fire through Schmeichel's legs.
Seconds later the substitute wasted a brilliant chance to make it 2-2, but the threat to the Foxes was limited as the second half wore on.