Valencia, who slumped to a 1-0 defeat against Almeria on Sunday, have taken just six points from a possible 30 since Koeman replaced Quique Sanchez Flores in the hotseat back in November.
But the Dutchman is adamant he will not walk out on the club and told AS: "I will not tender my resignation, not Monday, not Wednesday, not at the end of the season."
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