This article was originally published on www.si.com as Kylian Mbappe Reacts to 18-Year-Old Brother Ethan's Champions League Debut.

Ethan Mbappe, brother of Kylian, posted an emotional farewell to Paris Saint-Germain after following the new Real Madrid star out of the door. Article continues below Mbappe's contract expired ...

Since his professional debut, the French forward has consistently used this unique gesture after scoring—a move inspired by a heartwarming family anecdote involving his brother Ethan.

Kylian Mbappé showed his support for his brother Ethan's performance in Lille's 1–1 draw with Borussia Dortmund in the ...