De Bruyne suffered a ligament injury to the same knee in 2016 during a League Cup game against Everton which kept him sidelined for two months.
"The extent of the problem is not yet known and we will bring you further updates on Kevin's condition in due course".
However, with the season in its infancy and the transfer window closed, the Champions have now confirmed that their star midfielder is undergoing tests after sustaining an injury to his right knee in training this afternoon.
A similar recovery time this time round would see the Belgium global ruled out until at least November, but with the severity of the injury unknown, City manager Pep Guardiola will be left sweating over the results of his medical examinations.
His loss will be a major blow to Pep Guardiola after helping City to a record-breaking 100 points last season on the way to the title.
Manafort Team Opts to Not Present a Defense, Rests Case
The case is being prosecuted by the special counsel investigating Russian interference in the 2016 US presidential election. Andrew McCarthy predicted the defense's closing argument in Paul Manafort's trial will hone in on one person: Rick Gates .
Boy among 26 dead as bridge collapses in Genoa
A 2011 report by Italian highways company Autostrade per l'Italia said that the bridge had been suffering from degradation. The family had been making their way from Lucca, in Tuscany, to the Ligurian town of Imperia. "I'm out of words", he said.