Arsenal are watching Roma defender Kostas Manolas.
The Daily Mail says Arsenal sent a scout to Roma's Champions League qualifier against Porto to check on defender Manolas.
As the Gunners' search for a centre-back reaches the final week of the transfer window, representatives were on hand to see Roma beaten 3-0 by the Portuguese side as they crashed out of the Champions League 4-1 on aggregate.
The 22-year-old has played 88 games for Roma following a move from Olympiacos in 2014.