The Manchester United manager is confused as to why journalists continue to ask if the coaches will acknowledge each other when they meet in Monday's friendly in Beijing.
Manchester United boss Jose Mourinho became riled by questions over whether he will shake hands with Manchester City counterpart Pep Guardiola.
The duo endured a heated rivalry as respective head coaches of Real Madrid and Barcelona and will face each other for the first time as United and City bosses in Monday's International Champions Cup clash in Beijing.
Guardiola said this week that there was no reason they would not shake hands before the match, as they are both "polite guys" who simply "want to win.