Alvaro Arbeloa is set to leave the London Stadium when his contract expires next month so Bilic has been on the look-out for a replacement and it appears he's found his man.
"We need quality players".
While the move is not technically confirmed until a statement has been released by West Ham, it looks a safe bet for Hammers' fans to assume they have brought in a quality full-back with bags of experience for the 2017/18 season. We want it all, but those players are very hard to get and they cost a bit.
Hammers boss Slaven Bilić will certainly be hoping that Zabaleta cannot only improve his first team, but also assist in the development of young defenders like Sam Byram and Reece Oxford. We can't expect them to tick all the boxes with a mark 10.
The defender isn't the only player West Ham are hoping to sign from Manchester City with the Hammers also eager on a deal for Kelechi Iheanacho.
Loanees Calleri and Tore return to their parent clubs, Deportivo Maldonado of Uruguay and Besiktas of Turkey respectively, while Arbeloa will not be offered a new contract once his current deal concludes on June 30.
Turkey global midfielder Tore will head back to Besiktas following eight appearances in all competitions.
But now he must prepare to go face-to-face with his former side after reports suggested that the 32-year-old will join Premier League side West Ham in the summer transfer window.