Barkley was close to being sidelined through injury and was touch and go to start.
A fairly dour first half saw both sides miss just the one opportunity at goal.
The first saw Villa keeper Emiliano Martinez stop a shot from Leicester right back Timothy Castagne.
Trezeguet then launched a shot wide for the visitors as both rued missed chances in a game that did not open up.
Villa almost scored the opener in the 51st minute but Ezri Konsa’s header just went wide.
Ross Barkley will take the headlines and deservedly so. Super strike. But it is now three clean sheets in four matches for #avfc, who are yet to concede away from home. Strong defensive base provides the chance to nick matches like tonight.