Liverpool have threatened to complain to FIFA over Gladbach's interest amid tapping up accusations.
The Reds have also scrapped a planned friendly with the Germans in response to their attempts to tempt Brewster to the Bundesliga this summer.
However, BILD says Gladbach chiefs have shrugged off Liverpool's moaning and are continuing their bid to sign Brewster. The 'planned pursuit is continuing', it is claimed.
For their part, Liverpool insist they have triggered the third year of Brewster's Academy scholarship which means that no club is currently allowed to approach him.
Anyone doing so at this stage will run the risk of being reported for tapping-up the youngster.