The Blaugrana have lodged an appeal to CAS, protesting the 21-year-old's involvement in Argentina's squad, following a verdict by FIFA.

The football world governing body ordered all clubs to release players who are under 23 years of age to be present in Beijing.

However, Barca are not willing to be without their sensational forward when they play in the UEFA Champions League qualifying stage this month.

In the same manner, Bundesliga duo Werder Bremen and Schalke have also made appeals to CAS regarding Brazil duo Diego and Rafinha.