Josep Maria Bartomeu says Barcelona will sue Brazilian side Santos over the transfer of Gabriel ‘Gabigol’ Barbosa.
Gabigol joined Inter Milan on a fee approaching €30 million.
But Gabigol was one of the three players Barcelona had the right of first refusal on in their deal with Neymar in 2013.
“They haven’t respected the contract,” said the Barcelona president. “They’ve hidden it and we’ll act to protect our interests.”