Manchester City have looked unstoppable at times so far this season, with Champions League qualification secured and 36 goals scored in just 11 Premier League games.
However, a familiar issue continues to haunt Pep Guardiola's side and this was evident again during their 0-0 draw with Borussia Dortmund on Tuesday.
In the 58th minute, after Riyad Mahrez won a penalty for City at the Westfalenstadion, the Algerian stepped up but saw his spot kick saved by Gregor Kobel.
Mahrez has now missed two penalties in a row, after failing to convert a spot kick in their previous 0-0 draw with FC Copenhagen in the Champions League - in total he has scored 10 out of his 14 penalties since moving to the Etihad in 2018.