On reporter's inquiry about Mendy, who is now recovering from a knee ligament injury that has sidelined him since November, Guardiola laughed at the report and even queried a club press officer to see if he had any ideas.
"He said he was going for one day to Paris, but Hong Kong - that's far away".
"Mendy has a lot of things to improve and hopefully we can convince him to forget a little bit the social media and improve a few things", Guardiola said, per The Guardian.
Mendy has been away from the Manchester City first-team through injury.
Hong Kong, definitely not.' Mendy later tweeted to confirm that he was only joking but not before Sky had to apologise for broadcasting Guardiola swearing on air.
"Wow, I didn't know".
"It will definitely not be okay if he is Hong Kong."
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The club said their details had been taken by Hampshire police after footage emerged apparently showing two fans making aeroplane gestures.
Guardiola's comical reaction to Mendy's whereabouts soon vent viral with the hashtag #WhereIsMendy trending on social media. "I have to understand Instagram".
Guardiola was told of the posting as he held a press conference later in the day to preview the champions' Premier League clash with Chelsea on Sunday.
'Wow, I didn't know, ' Guardiola said.
"I respect what he says but I don't agree with him".
"I had tickets to go but the Premier League made a decision to put the game at Everton then".
"People believed managers arrive at good clubs and immediately create something", he said.
In Mendy's absence, City reclaimed top spot on the Premier League in midweek with a 2-0 victory over Everton at Goodison Park.
He appeared as a second-half substitute in City's Carabao Cup semi-final second leg win over Burton on January 23 but has missed the last four games as his comeback is carefully managed. Manchester City have a superior goal difference.