Inside Arsenal’s title doubts – and what will help them hold their nerve

As the Arsenal players returned to the dressing room in Sporting’s Estadio Jose Alvalade, the Kai Havertz version of Shakira’s Waka Waka could be heard in celebration of the German’s winner. Mikel Arteta’s squad have a relatable tendency to belt out supporter chants after especially joyous victories, of which there have been a few this season.