Manchester City is reportedly on the verge of completing a groundbreaking deal for RB Leipzig defender Josko Gvardiol by the week's end.

Despite various top European clubs expressing interest in the Croatian international over the past year, Manchester City appears poised to secure his services.

According to renowned journalist Fabrizio Romano, an astonishing fee of £86 million (€90 million/$98 million), including additional provisions, has been agreed upon. Gvardiol's medical examination is scheduled at the Etihad Stadium this upcoming Friday.

Upon completion, Gvardiol will become the costliest defender in football history, eclipsing the £80 million (€87 million/$96 million) fee Manchester United paid Leicester City for Harry Maguire in 2019.

This acquisition is a significant enhancement to Manchester City's defensive lineup, which was already among the Premier League's strongest last season, allowing only 33 goals, a figure matched only by Newcastle United.

Gvardiol will join his compatriot Mateo Kovacic in Manchester, following the central midfielder's £25 million (€29 million/$32 million) transfer from Chelsea earlier in the summer.

According to Kovacic, Gvardiol is well-prepared for the step up to Manchester City and has his support in showcasing his "best version."

After securing their fifth Premier League title in six seasons, Manchester City evidently refuses to rest on their laurels.

The addition of Kovacic is a vital boost to the squad, and manager Pep Guardiola will be aiming to reinforce the roster further during the summer, especially in light of potential departures like Riyad Mahrez and Ilkay Gundogan.