On 16 August 2014, Koscielny opened his goal-scoring account for the season, scoring Arsenal's first goal in the 2014–15 Premier League. The goal was header from a free-kick in first half stoppage time against Crystal Palace at the Emirates Stadium. After sustaining an achilles tendon injury during the October international break, Koscielny was absent from the Arsenal team for seven weeks. On 29 November, he returned to Arsenal's starting line-up alongside Per Mertesacker in central defence, as the Gunners kept a clean sheet in a 1–0 victory against West Bromwich Albion at The Hawthorns. In the team's following fixture at home to Southampton, Koscielny helped Arsenal to record a second consecutive clean sheet and 1–0 win.