Steve Beaglehole was full of praise for his young charges following Saturday's 2-0 victory at Coventry.
The Foxes went into the game having not conceded a goal in 180 minutes of football.
And the City defence again stood firm - with Adam Wykes and Ashley Chambers getting the goals on the day.
The only downside came when Liam Norval was sent off at the beginning of the second half.
Beaglehole said: "It was a terrific performance and I am delighted for the lads. We had to put together something of a makeshift defence, but they were outstanding and that's now our third clean sheet on the bounce."
City: Cisak, Mattock, Franklin, Norval, King, Muggleton, Dodds, Wykes, Gradel, Odihambo (Porter), Chambers (Lycett).
