Arsenal winger Bukayo Saka was accused of behaving inappropriately after their Champions League game with Bayern Munich.
The Premier League leaders had to settle for a 2-2 draw at home against the German champions.
However, Saka was furious at not getting a last minute penalty, which ex-Premier League star Paulo Di Canio labeled childish.
He stated: "He didn't behave as an experienced player.
"He behaved liked a baby with no experience."