One of Manchester United's weaknesses last season was their flawed rearguard - from 38 Premier League games the Old Trafford lost 12 whilst conceding 48 times.
Against pacey attackers, United have looked vulnerable for 18 months while the exits of Rio Ferdinand and Nemanja Vidic compounded a defensive situation where concentration lapses became a regular occurrence.
The club have already made measures to remedy this, with the introduction of teenage talent Luke Shaw, while Ander Herrera has a combative and prolific tackling element to his midfield play.
Louis van Gaal is also expected to make further signings, with Stefan de Vrij implied in a potential future deal at the Threatre of Dreams after his current club Feyenoord rejected a bid from Lazio because it was too low.
Perhaps the club should reignite their interest in a former target - Mats Hummels of Borussia Dortmund.
78% - Borussia Dortmund won 78% of league matches with Mats Hummels last season, compared to just 36% without him. Leader.— OptaJoe (@OptaJoe) July 21, 2014
A recent World Cup winner with Germany, Hummels scored twice from six appearances in Brazil, however, his defensive contributions were just as impressive.
The 25-year-old completed 29 clearances, 16 tackles and 11 interceptions.
Reports in Spain claim a £16 million transfer is close to fruition.