One thing that is certain about Rafa is that you can never be certain about Rafa.I don't think he will be able to. Nadal is too good again now and will dominate clay for the next 2-3 years.
I still think there are many big wins ahead for Wawrinka, though. He will have many more great wins on hardcourt when he returns from his surgery.
My thoughts exactly. Can he dominate single clay tournament? Yes, and then some good spanking from Rafa in the final. Can he dominate whole clay/other surface swing/season? Hell no, never has, never will.Wawrinka has NEVER dominated a season or period on any surface, or even come close. It isnt going to magically happen for the first time at 30 something. Can he win the French Open or another major, or say Rome or another Masters, yes that is possible of course.
Most likely Nadal will dominate the clay court season just as he did in 2017 however.