Manuel Pellegrini's side barely had to break a sweat in order to see off the Premier League's lowest-ranked side but lost Edin Dzeko in the warm-up before their captain limped out
The only real setbacks for Manuel Pellegrini's side were injuries, with Edin Dzeko was injured in the warm-up and replaced by youngster Jose Angel Pozo before captain Vincent Kompany hobbled off the pitch with a hamstring injury towards the end of the second half.
But last year's champions did not need to hit their best form, with loanee Lampard finishing off the only goal of the game five minutes before half-time and the Foxes unable to offer any serious response.
|VIEW FROM THE GROUND
|By Paul Macdonald
Manchester City produced the kind of performance required of champions every now and then but it was more than enough to see off a tepid Leicester City side.
Frank Lampard's first-half goal proved the difference, the kind of strike upon which he has built a career, drifting into the area to convert a Samir Nasri cut-back.
The only concern for City on the day was the injuries to Edin Dzeko and Vincent Kompany - with the busy Christmas period coming up, Manuel Pellegrini can ill afford to be short of options in his squad.
The hosts broke confidently in the third minute as Jamie Vardy sprinted away from Bacary Sagna and Fernando made a vital interception with Jeffrey Schlupp poised to convert.
Vardy led the charge for Nigel Pearson's team in the opening stages, running at the Manchester City defence in the 12th minute before Eliaquim Mangala did enough to force his shot behind.
The champions' anticipated lack of presence up front meant Leicester were able to confidently launch regular attacks and goalkeeper Joe Hart was grasping at thin air when Esteban Cambiasso's curling free kick flew narrowly wide.
Hamer made an excellent 32nd-minute save to keep Yaya Toure's shot out of the bottom corner but he could do nothing five minutes before the break as Lampard deftly turned a shot home from close range, following fine work by Samir Nasri on the left of the Leicester box.
Pellegrini's men absorbed further pressure after the break before Toure's pass released Nasri, whose 56th-minute cross was sent wide at the near post by Silva.
Referee Jon Moss was unmoved by Leicester penalty claims when Mangala bundled into Vardy at the near post but the earlier rhythm of Leicester's attacks was absent by the time Pearson sent on top scorer Leonardo Ulloa.
The former Brighton striker swivelled to shoot in the 80th minute, Kompany's replacement Martin Demichelis deflecting the effort wide with Hart wrong-footed, and the same player hooked a bouncing ball over in stoppage time as Manchester City hung on.