Nigerian forward, Obafemi Martins is among several top free agents looking to be snapped up even with the transfer window shut.
Martins, who last played in 2018 for Shanghai Shenhua, has been without a club since he was released by the Chinese Super League side.
The former Inter Milan and Newcastle United forward, is currently valued at €1million.
He was listed by Spanish online Sports publication, Marca, as one of many veterans who is still available in free agency.
Retired from international football in 2015, Martins had 42 caps for Nigeria and is fifth in the overall top scorers for the Super Eagles – with 18 goals.