Gremio have knocked back Monaco's bid for star midfielder Arthur, reports UOL Esporte, with Barcelona still in talks for the midfielder about a future move after the January window shuts.
The Copa Libertadores winners rejected the €14m offer from the Ligue 1 champions.
Gremio are holding out for €30m (£26.2m) to sell their 60 percent stake in the player's economic rights -- which would value the player at €48m (£42m).
Further talks with Barcelona will take place in the coming days, with move in the summer to the Camp Nou seeming likely after images of the player wearing the Blaugrana shirt surfaced at the end of last year.