Bernardo Silva tweeted a photo of Mendy as a child alongside a dated image from Spanish confectionary 'Conguitos' that has been criticized for its racist connotations, with the caption: "Guess who?".
Mendy did not appear to take offense, replying with laughing emojis and a message saying: "1-0 for you will see", but other Twitter users were quick to point out the racist implications of Bernardo Silva's post.
Can’t even joke with a friend these days... You guys... 🤦🏻♂️— Bernardo Silva (@BernardoCSilva) September 22, 2019
The attacking midfielder deleted the entry before commenting: "Can't even joke with a friend these days…You guys…"
The Football Association (FA) has confirmed it will investigate the matter and Kick It Out, football's equality and inclusion organization, wants to see punishment meted out.
"We are extremely disappointed to see the tweet posted by Bernardo Silva, which has since been deleted. Racist stereotypes are never acceptable as 'banter', and we're shocked that someone who is a role model to millions has failed to understand the discriminatory nature of his post.
"The FA have been notified and we believe that retrospective action should be taken, including mandatory education – which is vital to challenge offensive behavior such as this."
The tweet from Bernardo Silva came less than 24 hours after he scored a hat-trick in City's 8-0 victory over Watford, which saw Mendy make his first Premier League start since April.