Arsenal's move for Juventus midfielder Arthur could collapse after they refused to sanction an 18 month loan.
Arthur missed Juventus's first six games of the season due to injury but since then has only started five matches in Serie A having struggled to make an impact on the first-team.
Juve though are reluctant to allow the former Barcelona star to depart without signing a replacement first, leaving any potential deal up in the air.
The Gunners are also continuing their hunt for a striker, with Everton's Dominic Calvert-Lewin under consideration, although Borussia Dortmund are also monitoring the Toffees hitman as they brace for the potential loss of starman Erling Haaland in the summer.