NewRadical
Player Valuation: £30m
It's quite rare actually that one manager has managed both sides of a rivalry
Arry manged both Saints and Pompey
George Graham managed both Spurs and Arsenal
Samuel managed both Mags and Black Cats
Mourinho and Dave Sexton both managed Man United and Chelsea, but that's not much of a rivalry
Any obvious ones I'm missing?
He's also managed both Birmingham City and Aston Villa.