De Bruyne helped City record what was a 10th straight victory of the new campaign as they came from behind to beat the Swans 3-1 with a brace from Sergio Aguero.
Reports on Sunday suggested De Bruyne had already been ruled out for around a month with a hamstring problem, meaning he would certainly miss the Champions League game against Celtic in Glasgow on Wednesday night as well as Belgium's forthcoming World Cup qualifiers over the international break.
However, Press Association Sport understands City are not expecting to have a full prognosis of De Bruyne's injury for at least the next 48 hours.
Speaking following the Swansea game, City boss Pep Guardiola said: ''I think he is injured
We go back to Manchester tonight (Saturday), and he will be seen by a doctor tomorrow (Sunday)
The way he reacted, it looked like muscular, but I am not a doctor."
Premier League leaders City are set to play second-placed Tottenham next weekend and then host Everton following the international break, before a Champions League tie away at Barcelona on October 19
Source : PA
Source: PA