Sevilla's new £5 million signing Aquivaldo Mosquera has found himself in the middle of a transfer row between his former clubs Atletico Nacional of Colombia and Mexico's Pachuca.

Nacional are demanding £500,000 from Pachuca as part of a sell-on clause written into his move from Colombia to Mexico. Nacional chiefs are now threatening to take the matter to FIFA, though it should not affect Mosquera's Sevilla status.