Pep Guardiola now has plenty of options in Manchester City's defence and there will be strong competition for places when they kick off the Premier League season next month.
Benjamin Mendy (age 23, £52 million): The France international learned the art of fast-paced wide play from Marcelo Bielsa at Marseille and took his game on further at Monaco, helping them to the Ligue 1 title and Champions League semifinal and became one of the most exciting young left-backs in Europe.
There's a little over a month to go in the transfer window, with clubs across Europe desperate to add to their squads ahead of the new season.
Romelu Lukaku remains the most expensive Premier League purchase at £75 million from Everton to Manchester United, while AC Milan have made everyone sit up and take notice of their lavish spending spree that includes luring Leonardo Bonucci from Juventus.
ESPN FC's club correspondents and bloggers rate their club's business so far and discuss what else...
Despite Manchester City's stellar forward line of Sergio Aguero, Gabriel Jesus, Leroy Sane and the rest, Vincent Kompany could emerge as possibly the most important player to Pep Guardiola this season.
The City boss has decided not to spend heavily on a new front-line central defender and is set to make the Belgium captain the cornerstone of his new-look back four. It's a gamble given the 31-year-old's recent injury record, but could pay out huge dividends if Kompany can hold things together.
Pep Guardiola's wishes are coming true, as brick by brick he is being allowed to assemble an expensive new Manchester City side. From a squad that could and maybe should have been disassembled a year or two earlier, the rejuvenation is now in full swing.
People will gasp at the amounts being spent, but City have held on to many players until they were not fit for purpose and are now being punished for not acting sooner. The market always sees City coming, but this summer's obvious needs...
When Manchester City opened their new academy complex at the Etihad Campus in December 2014, it came with what chairman Khaldoon Al Mubarak called a "vision for youth development and sustainability."
Two-and-a-half years on, there seems to be a blockage between the academy and Pep Guardiola's squad. There have been talented hopefuls -- such as Aleix Garcia, Angelino, Pablo Maffeo or Tosin Adarabioyo -- but none have yet made the step up to be considered a serious option in the Premier League...