Following a defeat by the same scoreline at Manchester City in the Premier League Cup the earlier weekend, Will Russ and Justen Kranthove scored before the break while Sidnei Tavares added another with 10 minutes of normal time remaining.
It is a result which leaves the young Foxes in sixth position in U18 Premier League South ahead of next Saturday's visit to Staplewood to tackle Southampton (12pm BST kick-off).
After that, on Saturday 3 December, City welcome West Ham United's youngsters to Belvior Drive before picking up their Premier League Cup campaign at home against Blackburn Rovers.
City: Bosworth, Barrett, Thomas, Elewa-Ikpakwu (James 40), Kranthove, Husek, Pennant, Loughlan, Russ (Myring 84), Tavares (Fitzhugh 88), Flynn
Subs not used: Evans, Gyamfi
Goals: Russ 7, Kranthove 9, Tavares 80