Brattan joined Manchester in 2015 after leaving Brisbane Roar following disputes over unpaid superannuation. 

The midfielder was then sent out on loan to Bolton Wanderers, but did not play a single minute for the Championship side. 

In June 2016 Manchester confirmed he had been loaned out to Melbourne City on a one-year loan deal, helping the side win their first trophy in the FFA Cup. 

It was just a matter of when not if City would announce his loan would be extended, with the club confirming the deal on Tuesday ahead of their FFA Cup Round of 32 clash with Heidelberg United. 

However, fellow loanee Anthony Caceres will not continue with City in 2017/18, with the club announcing he has moved to Al-Wasl FC in the United Arab Emirates.