Mats Hummels 'preparing his exit from Borussia Dortmund' - Eurosport
Mats Hummels: Imagining Life After Selling Borussia Dortmund Great | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Borussia Dortmund to Use Mats Hummels as Make-Shift Forward if World Cup Winner Re-Joins Club - Sports Illustrated
Off the Crossbar: Cologne Alone — Borussia Dortmund's Mats Hummels gone and forgotten - Bavarian Football Works
Mats Hummels critical of Borussia Dortmund's performance against Sevilla
BVB 09 | Teams | First Team - Player: Mats Hummels | bvb.de
Manchester United transfer news: Mats Hummels 'tells team-mates' his Borussia Dortmund exit is on the verge of being sealed | The Independent | The Independent
Mats Hummels on what convinced him to make Borussia Dortmund return
Mats Hummels: "Borussia Dortmund a bigger team than when I was last here" | Bundesliga
Borussia Dortmund's Mats Hummels suffers the unkindest cut of all from Germany - Bavarian Football Works