In November 2014, Papastathopoulos was ruled out of action for two weeks with a broken fibula. He suffered the injury to his right leg in Dortmund's 1–0 win over Borussia Mönchengladbach, a result that ended a five-match Bundesliga losing streak for the club. After recovering early, he was deemed fit for BVB's Champions League match against Arsenal on 26 November. On 3 January 2015, football news website Goal.com assessed statistics to determine which players maintained the highest tackle success rate in the first half of the 2014–15 season across Europe's top five leagues; Papastathopoulos finished joint-third, alongside Hamburger SV's Matthias Ostrzolek, having won 92.59 per cent of all tackles.