Don't let Bukayo Saka’s infectious smile fool you. The England winger is as tough as they come and Arsenal’s medical team can testify to that.
After one Premier League game last season, they were horrified to see a gaping wound on Saka’s leg after he rolled down a sock, only to be even more astonished when he declared himself fit to play a few days later.
Similarly, do not assume he ignored Rio Ferdinand’s suggestion that he is not world class. Saka saw it, heard it and stored it away in the memory.