If he gets his first serve percentage up from the 37%
from last set, he should be fine.
I actually think that his counter-punching strategy is effective right now. Falla covers the court pretty well, Gilles isn't really on his game, so why not wait for Falla to make the error?
Gilles is smart and doesn't work any harder than need be
But, seriously - it appears like it's really hot there. I haven't seen such a strong sweat pattern on him in a very long time.