Why did Nadal 18 Wimbledon lose to Germany?

Nadal lost to Djokovic at Wimbledon 18 because Djokovic is good at hitting the ball in the rising period. According to the relevant public information, Djokovic is good at lifting the pole, and Nadal's topspin is often hit back by the board before bouncing to the highest point, which makes it difficult for Nadal's topspin offensive to play a role in Djokovic.