The sight of the Gunners’ marquee striker sprawled out with blood streaming from his scalp was cause for conern. Medical staff raced on, surrounding the 26-year-old while Gabriel stood over him, visibly shaken. The wound, a nasty-looking gash on his head, needed urgent treatment. A lengthy pause followed, stretching to almost four minutes, as Gyokeres was patched up on the pitch before being escorted to the sidelines.