The Marseille centre-back has regularly been linked with a move to the Premier League across recent transfer windows, but continued to stay in France.
He could though move to England before the transfer window shuts today and has flown into the country in a bid to force through a move.
Southampton see Caleta-Car as a replacement for Jan Bednarek, who is wanted by several clubs today.
However, the Saints face competition for his signature now as David Moyes’ West Ham have joined the hunt.
The Hammers have made signing a centre-back a priority today, especially as they could lose the services of Craig Dawson.
Caleta-Car is an experienced campaigner and helped Marseille to a finish of second in Ligue 1 last season.
The 25-year-old is now into the final year of his contract with Marseille and the French giants are keen to cash in on him.
