Would you suggest Wawrinka instead? Outside of the h2h I can't find a reason. If you want to talk h2h, Berdych played him very tough way back in Australia when Wawrinka was playing the best tennis of his life. Wawrinka is maybe 60% of that guy now imo.
I also wonder about his mentality with the Davis Cup in a few weeks.He seems a bit checked out to me.