Arsene Wenger faced many challenges from Jose Mourinho during his time as Arsenal manager.
The pair had a well-documented rivalry during Mourinho's time at Chelsea and Manchester United, with the Portuguese manager famously labeling Wenger 'a specialist in failure'.
Mourinho has spoken about his respect for Wenger since he left Arsenal, but the Frenchman might have been surprised to see a question from his former foe during a Q&A session with the Guardian.
The Frenchman had a legendary 22-year spell in charge of the north London club, which saw him claim three leagues titles and seven FA Cups.