What is most likely to happen in 2018 with respect to Nadal and Federer winning Slams?

Nadal wins two and Federer wins two. Federer: 21, Nadal: 18. 4% (2 votes)
Nadal wins one and Federer wins one. Federer: 20, Nadal: 17. 14% (7 votes)
Nadal wins one and Federer wins two. Federer: 21, Nadal: 17. 35% (18 votes)
Nadal wins two and Federer wins one. Federer: 20, Nadal: 18. 24% (12 votes)
Nadal wins three and Federer wins one. Federer: 20, Nadal: 19. 12% (6 votes)
Nadal wins one and Federer wins three. Federer: 22, Nadal: 17. 8% (4 votes)
Nadal wins three and Federer wins three!!!!!!!!!!! Federer: 22, Nadal: 19. 4% (2 votes)

Total Votes: 51

See this poll on: https://poll.fm/10001354/embed

Give others the chance to vote.