Barcelona are reportedly having second thoughts about completing the signing of Gremio's Arthur, with concerns surrounding the physical stature of the 21-year-old.
It was believed that the attacking midfielder had agreed to join the Catalan side in March, however, according to Mundo Deportivo, despite having paid an initial €4m to have the first option to sign him, the club are undecided as to whether they are to pay the subsequent €26m in order to complete the deal.
The issue surrounding the Arthur deal is believed to be regarding his height. Standing at 5'6", officials at the club would prefer to sign a tall, physical midfielder, similar to the likes of Ivan Rakitic and Paulinho in recent seasons.
Ernesto Valverde's side have until 15th July to make up their mind regarding Arthur, although the Spanish publication believe the club have other midfield targets they can pursue.
Arthur came to prominence after he enjoyed a promising breakthrough season in 2017, helping Gremio secure their first Copa Libertadores title since 1995, although his expected move to Spain now appears to be hanging in the balance.