The decision to award a spot-kick to City came just moments after another flashpoint involving Sterling, as the 22-year-old went to ground after seemingly being felled by Huddersfield goalkeeper Jonas Lössl, only to see his protests waved away by referee Craig Pawson.
In the past, Sterling has faced criticism for failing to add end product to his prodigious dribbling skills and pace but this campaign he has been prolific in front of goal.
The performance at Leicester suggested a team at the top of its powers, with the home side unable to make any kind of meaningful impression on the smooth-running visitors.
On its last trip to Turf Moor, in October 2016, Laurent Koscielny scored the only goal in the 93rd minute. The second was given and Aguero stroked into the bottom corner.
Their comeback victory also broke a Premier League record. Gylfi Sigurdsson's long-range strike canceled out Dusan Tadic's opener, but Charlie Austin scored two second-half headers before Steven Davis rounded off the scoring. Because there are games every three days and you have to play a lot of games like this. The club is still searching for a permanent replacement, with Unsworth's failure to improve results likely having ruled him out.
"I think like always we have to be focused on our performance and I think the performance was good today". I think the penalty is more than clear'.
The England winger produced another marvellous individual display for City in a pulsating clash at the John Smith's Stadium.
Manchester City set out for a tricky-looking fixture across the Pennines at Huddersfield this weekend with the weight of expectation beginning to weigh ever-heavier on their shoulders.
"We have a lot of players who have the ability to score a goal, not just the strikers".
After appearing to struggle last season in English football last season, Pep Guardiola has definitely adapted to the rigours of Premier League football in his second season.
Raheem Sterling proved the difference maker as it was the England global who won the penalty which Aguero duly put past Lossl in the Huddersfield goal.