Manchester United appears to already be active in rebuilding its back line.
The club is reportedly close to signing Mats Hummels, according to Spanish newspaper Sport.
United has agreed to a 20 million euro transfer with the 25-year-old defender's previous club, Borussia Dortmund, per the paper's report.
The report states that the deal could become official later in the week.
Hummels has been a staple on Dortmund's back line ever since they acquired him from Bundesliga rival Bayern Munich in 2008. He was instrumental in the defensive structure that helped lead the team to back-to-back German titles in 2010-11 and 2011-12.
He was named to the All-Star Team for the 2014 FIFA World Cup in Brazil after helping lead Germany to its first world title since 1990. He scored the lone goal in his nation's quarter-final victory over France, earning Man of the Match honours.
United is coming off a seventh-place finish in the Barclays Premier League, marking its worst domestic showing since 1989-90 when the club finished 13th. The club is in the midst of an off-season overhaul that began with the appointing of Dutch national manager Louis van Gaal being put in charge of the club.
The club must now overhaul its defence as the trio of Nemanja Vidic, Patrice Evra and Rio Ferdinand have all moved on to new clubs. The three have anchored United's defence together since 2006.