Atletico Madrid to Manchester City, £4.7 million
Arriving at Manchester City with little fanfare, £4.7 million Bulgarian winger Petrov soon made a name for himself in the Premier League with his killer pace and brilliant runs down the wing. PICS: Football lookalikes | Prem's most hated | Last season's worst transfers
London? Buenos Aires? Rome? We look at the most fiery rivalries in world football
