Brighton defender Inigo Calderon has agreed to join Southampton.
Seagulls boss Gus Poyet wanted to keep the Spanish full-back, who arrived as a free agent in January, but he has turned down the offer of a new contract and opted to move along the south coast.
"We are very disappointed because everything was agreed," said Poyet.
"He waited for a possible offer and we can't compete with it. He won't be our player and I am disappointed with him and his agent.
"I thank him for his services but we took a big risk because he's injured. I am disappointed because he chose to wait and not sign for us."
Source: PA