Rumours that the club's owners George Gillett and Tom Hicks may consider a big-money offer for the Spanish striker in the summer has prompted the manager to state his position.
"I'm confident it will never happen. If it did, I'd resign," he said. "When we have spent big, normally it's been very good business - Torres, Mascherano, Reina, Alonso.
"Keane is a good player but we had to sell him because he was not playing at the level we knew he could play.
"Ryan (Babel) was signed for the future and we are waiting for his improvement. He has to be more consistent.
"With the fringe players, we needed to take a gamble on Bosmans and one, two million-pound players.
"Some of these players have not been good enough for us. It is a risk you have to accept when there is not too much money about."
