The 20-year-old has been one of his club's most impressive performers since breaking into their first-team last season.
He has been a virtual ever-present over the past two campaigns, providing a powerful, energetic presence in Osasuna's engine room.
His displays have also caught the eye of Valencia who were keen to secure his services for next season, but the chance to link up once again with Javier Aguirre - the coach that gave him his break at Osasuna - appears to have convinced Garcia of a move to Atletico.
According to Spanish sports newspaper Marca, a five-year deal and fee of ‚é¼12million (£8million) have been agreed between all parties with the player's signature on the contract now the only thing delaying the transfer.
