Maddison returned unscathed and Martin Lorentzson completed 45 minutes in a hard fought 1-0 victory...
Coventry City Under-21s earned their first win under coach Lee Glover thanks to a 1-0 win over Birmingham City at the Alan Higgs Centre.
Under-18s first-year scholar Jordon Thompson netted a second-half winner in a game which saw Martin Lorentzson complete 45 minutes and James Maddison come back from injury, playing just over an hour.
Visitors Birmingham City started the game brightly though and hit the crossbar twice in the space of the opening 20 minutes, when former PSG player Christie Manzinga nodded against the woodwork, before Kyle MacFarlane smashed a 20-yard effort past Corey Addai but against the frame of the goal.
Lateef Elford-Alliyu then had an excellent chance just after the half-hour mark, as he raced through from a lovely ball from Lorentzson but was denied by Connal Trueman.
Lorentzson was then replaced by Thompson at the break, with the Sky Blues upping the ante in the second-half.
Maddison came so close to getting that first goal three minutes before the hour, when he hit a wonderful free-kick from 25-yards which curled against the right-hand post.
But the 19-year old got his set-piece just right for the opening goal just four minutes later, when he whipped in a beautiful dead ball from 25-yards and Thompson side footed in a lovely finish to give Glover's men the lead.
The Sky Blues had to dig in after that and survived a goal mouth scramble, before Charlie Cooper had a shot blocked and Addai made a great save to deny Reece Brown's follow up effort, all in the space of around ten seconds.
It was frantic, but City could have extended their lead when Jordan Shipley's wonderful ball in from the left was met by in-form Bassala Sambou, but the striker couldn't make clean contact from four-yards at the back post and prodded the ball wide.
It was a gutsy performance from the young Sky Blues who defended the lead with everything they had and deservedly ground out the result to give Glover his first win in charge.
Coventry City: Addai, Lorentzson (Thompson 45), Leahy, Harries, Di Kelly-Evans, Sambou, Maycock, Shipley, Haynes, Maddison (Hickman 62), Elford-Alliyu (Bayliss 78).
Subs not used: Whitmore.
Birmingham City: Trueman, Dacres-Cogley, Bernard, Baba, Mbende, Harding, MacFarlane, Cooper (Cotton 79), Manzinga, Brown, O'Neill (McDonald 69).
Subs not used: Weaver.