Kompany, who has been plagued by a variety of muscle injuries over the past 12 months, was originally expected to miss three weeks but has now been sidelined for five.
The Belgian FA team physio Lieven Messchalck was sent to assess the defender.
Messchalck suggests that Kompany is likely to be out for a further three weeks, bringing the total time out to around eight weeks, and will see him miss the Super Sunday game against Tottenham Hotspur on 24th November.
Lieven Messchalck: "I think Vincent is going to be ready in several weeks.
"We will do everything we can to bring back Vincent in a good way for a long time.
"First of all he had a rupture, a tear into the abductor and then also he has bad luck with a small thing on the front side now, so it's everything together.
"It's not really so long, eight weeks is nothing in the time of injury, you must respect biology."
Manchester City Fixtures
Sunday November 24
13:30 Premier League
Manchester City v Tottenham
Wednesday November 27
19:45 Champions League - Group D
Manchester City v Plzen
Sunday December 1
16:10 Premier League
Manchester City v Swansea City
Wednesday December 4
20:00 Premier League
West Brom v Manchester City
Saturday December 7
15:00Premier League
Southampton v Manchester City