Southampton are interested in Atletico Madrid midfielder Nicolas Gaitan this January.
Mauricio Pellegrino has been tracking the Argentine star since before Christmas, and knows him from his time managing in Spain.
The 29-year-old has been afforded limited first-team opportunities under Diego Simeone since joining from Benfica in 2016.
Gaitan is keen on a move to the Premier League in order to boost his hopes of making Argentina's World Cup squad this summer.