Sol set to make decision
The 34-year-old has since been linked with a string of clubs, both at home and abroad, including Blackburn, Aston Villa, Everton, Newcastle and St Etienne.
Swiss outfit Basel and Greek side Atromitos are now also believed to be in the running for the stopper's signature.
Campbell's agent, Sky Andrew, had previously insisted that the ex-Spurs skipper - who made more than 250 league appearances for the White Hart Lane outfit - was in no rush to finalise his future, saying:
"Sol is a grown man and makes his own decisions. It's not like when he was a teenager and I would advise on him on his options, he is a big man now and decides for himself what he is going to do."
However, according to Sky Sports News, Campbell will decide where his future lies within the next seven days.