India exploited a rusty German defence, punching three goals as the Harmanpreet Singh-led side outclassed the world champions to make a winning start to the London leg of the FIH Pro Hockey League here on Saturday.

Drag-flicker Harmanpreet (16th minute), Sukhjeet Singh (41st) and Gurjant Singh (44th) tormented an out-of-sorts young German side, who started off on a roaring note but could not sustain the momentum.