IVANKA TRUMP'S APPEARANCE
For a moment at the G-20 summit, the United States was represented by another Trump, when the President's daughter Ivanka took a seat at the table of world leaders.
The 35-year-old former model sat at the table with Chinese leader Xi Jinping, Turkish President Recep Tayyip Erdogan and German Chancellor Angela Merkel. She had been at the back of the room but "briefly joined the main table when the President had to step out", a White House official told Agence France-Presse.
That quickly sparked a storm, with historian Anne Applebaum slamming what she called "an unelected, unqualified, unprepared New York socialite" being seen as "the best person to represent American national interests".
XI AS PRESIDENT OF TAIWAN
Mr Donald Trump's press secretary mislabelled Chinese President Xi Jinping as the leader of Taiwan after the leaders' meeting at the G-20 summit. A White House transcript of Mr Trump's remarks referred to Mr Xi as president of the Republic of China - the official name for Taiwan - instead of the People's Republic of China.
Mr Trump's Instagram feed had also confused Prime Minister Lee Hsien Loong for Indonesian President Joko Widodo. The mistake was quickly rectified.
MACRON WARMS TO TRUMP
If a video of French President Emmanuel Macron swerving away from Mr Trump to greet other leaders was a key image from a Nato summit earlier this year, at the G-20, there appeared to have been a rapprochement between the two leaders.
Mr Macron was at Mr Trump's side at "family photo" sessions of the leaders. At a concert of Beethoven's Symphony Number 9, the former investment banker was seated next to the US billionaire.
MERKEL ROLLS EYES AT PUTIN
An animated encounter between Dr Merkel and Russian President Vladimir Putin has been making the rounds on social media, with much buzz and speculation about what the two leaders discussed.
Walking into the conference room, Dr Merkel lifted a hand and traced what appeared to be movement of a projectile.
But Mr Putin held up a finger, then offered his version of the same gesture, prompting the usually poker-faced German Chancellor to roll her eyes.
AGENCE FRANCE-PRESSE, BLOOMBERG