Lewis Kenny, 13, copied the Real Madrid and Manchester City stars with his trendy short back and sides hairstyle.
But teachers at by St Ambrose Barlow High School in Wardley, Salford, considered it 'extreme' and put the Year 9 pupil in isolation.
Lewis's parents, Liam, 49, and Angela, 50, from, Worsley, have now complained to the school.
Liam told his local paper: "What I want is an acknowledgement that they are wrong.
"They have said that he has an extreme haircut and he must restyle his hair to how the school wants it.
"The haircut is similar to Sergio Aguero and Gareth Bale and it's a modern haircut for a boy his age to have."
He added: "Lewis's hair is a number three cut and longer on top.
"It is a better look than long greasy hair.
"The school said they had spotted a line in his hair like the one worn by Aguero.
"But he only has a line put in the school holidays.
"He was upset to be placed in isolation and we are standing firm on this. It is disgraceful.
Head teacher Marie Garside said: "Both parents and pupils are made aware of our high expectations and aspirations before they choose the school.
"We are very clear about what we accept and don't accept and we make it explicit about what we feel are appropriate standards at our parent information evenings.
"Our staff work above and beyond the school day to make sure pupils work as well as they can and reach their potential."
More on Parentdish: Should young children have extreme fashionable haircuts?