Indeed, while Olivier Giroud and Mathieu Flamini bear the brunt of Arsenal supporter criticism generally, Walcott's popularity has taken a nosedive in recent weeks following a very, very poor run of form.
Fans were bewildered when the 27-year-old was picked for Roy Hodgson's most recent England squad and the winger came on to absolutely no effect once again (unsurprisingly, of course) in Barcelona earlier this week.
But one man who did impress for Arsenal at the Nou Camp was all smiles alongside Walcott in training.
Alex Iwobi, only 19, showed a fearlessness young players often will when they are thrown in at the deep end. Iwobi has already impressed for the north London side this season - even in pre-season, when he starred during the Emirates Cup.
Iwobi's place in first-team training on Friday may be a hint that Arsene Wenger plans to use him again at Everton...