Transfer ANGER: 10 TOXIC moves, including BITTER Arsenal, Chelsea, Liverpool & Man Utd deals

4. John Obi Mikel – Lyn to Chelsea (2006)

This ended up costing Chelsea £12m which had to be paid to United, while Lyn received £4m. Mikel was set for Old Trafford in the summer of 2006, but after going missing and a whole host of rumours that he had been kidnapped, he eventually signed for their Premier League rivals instead.