LONDON — When Manchester United beat Manchester City to the £30.75 million signing of Dimitar Berbatov from Tottenham two years ago, Reds fans were delighted they had pipped their wealthy rivals to the signature of such a talented striker.

As Manchester prepares for the most eagerly awaited derby in 40 years City fans are laughing at their neighbors. The Bulgarian striker has been a hugely expensive flop, and to rub salt into United's wounds Carlos Tevez has been sensational for City since switching clubs last summer, scoring 28 goals in 37 matches.

Defeat for United at Eastlands would kill off any lingering hopes it has of retaining its Premier League crown. A win for City would leave it in poll position to finish fourth and secure a Champions League berth for the first time.