(CNN) The seedings for Wimbledon are out, and they are unlikely to please Rafael Nadal.

That means Nadal, who is ranked second in the world but has struggled on grass in recent years, could meet defending champion Djokovic in the semifinals in the grass-court grand slam.

Wimbledon is the only one of the four majors not to follow world rankings and takes into account form on grass.

"It's their choice. Either way, being second or third seed, I have to play at the best level to aspire to the things I aspire to," the 33-year-old Nadal told Spanish TV station Vamos Tuesday.