It seems a strange choice of location given the hostility between the two teams, but the German is keen to add to his credentials.
Mertesacker retired 12 months ago having spent seven years at the Emirates under Arsene Wenger.
The German’s appointment was well received, but his interests outside of football saw him come in for criticism earlier this year.
Mertesacker fulfils a role as a basketball pundit, and on one occasion did so instead of watching Arsenal’s under-18s beat Tottenham in January.
Former Gunners winger Perry Groves said: “You would expect Mertesacker, as academy director, to be at the game but apparently there was a more important game for him to watch – Washington Wizards against the New York Knicks in the NBA in London.
“I thought someone had made it up – that wouldn’t happen, he wouldn’t do that.
“But then you find out he hasn’t only gone to watch it, he’s actually a pundit! He’s being paid to be a pundit on the basketball!
“That can’t be right! It can’t be right that your academy director is watching a basketball game that means nothing to him and is getting paid instead of watching Arsenal’s Under-18s.”
Mertesacker’s job is to try and provide Unai Emery with a conveyor belt of talent that can further Arsenal’s ambitions.
And according to the Daily Mail, Mertesacker has used Tottenham’s training facilities when studying for his coaching badges.
Emery has been keen to use the club’s homegrown players this summer, perhaps partly down to a lack of investment in new signings.
19-year-old Joe Willock came on as a substitute in Arsenal’s the Europa League final defeat to Chelsea and showed plenty of promise.
Emery though is keen to strengthen his squad this summer with the Gunners deficiencies clear for all to see in Baku.
Defence remains a problem area for Emery and he is looking to identify players who can sure up a leaky backline.