A nine-goal Champions League classic saw holders PSG sensationally beat Bayern Munich 5-4 in the first leg of their semi-final in Paris.The goal-fest, which saw Bayern Munich goalkeeper Manuel Neuer fail to make a save, was the first time in a European semi-final match that both teams scored four or more goals.It was also the joint-highest scoring semi-final match in European Cup history after Rangers’ 6-3 loss to Eintracht Frankfurt in 1960.A remarkable five-goal first half at the Parc des Princes saw PSG lead 3-2 at half-time through Ousmane Dembele’s stoppage-time penalty.Khvicha Kvaratskhelia and Dembele then both scored in the space of 143 seconds to put PSG 5-2 up in the 58th minute.But Bayern hit back with two goals in three minutes through Dayot Upamecano and Luis Diaz to make it 5-4 in the 68th minute and give them hope for next Wednesday’s return leg in Germany.