The 24-year-old star is upset that Spurs have still not agreed his move to Real Madrid.
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And he's confided in his Wales team-mates that he'll never wear a Spurs shirt again, according to claims in one national newspaper.
A Wales insider told the paper: "Gareth is confused and bitter. He can't understand why Spurs have not agreed what would be the largest transfer fee in history.
"How could any player not be affected when he knows one of the world's biggest clubs has made a huge bid - but that the deal isn't progressing?