Former Arsenal defender Sol Campbell is undergoing a medical at Premier League rivals Portsmouth with a view to joining the south coast club.

"I can confirm he's having a medical," a club spokeswoman said, without giving further details.

The England central defender, who will be 32 next month, could be signed by Pompey manager Harry Redknapp as a free agent. Campbell ended his five-year spell with Arsenal last month, saying he wanted a "fresh challenge."

Campbell left after a particularly difficult season in which he stormed out of a game in February against West Ham United at halftime after being responsible for Arsenal conceding two goals. He was then sidelined for 10 weeks by injuries.

A former Tottenham Hotspur captain, he joined their north London rivals in 2001 and went on to win two league titles and three FA Cups with Arsenal.

He scored in their Champions League final defeat by Barcelona in May, but was second choice for England at the World Cup.