Borussia Dortmund and Bayern Munich’s Champions League final clash on Saturday is the fifth meeting between the two sides in 2012-13 but the battle has been taking place off the pitch for months. Sixteen years ago, BVB tried to steal Bayern’s crown with big spending and were duly rewarded with two Bundesliga titles and even did what Bayern had failed to do for 20 years – sealing European glory with the Champions League in 1997.