Wawrinka vs Zverev prediction

Stanislas Wawrinka will face Alexander Zverev in the 4th round of ATP tournament in Miami. Wawrinka looks much better to me at this moment, he easily beat Jaziri in the previous round, while he also was convincing against Zeballos. Wawrinka also was great last week on India Wells where he reached final so I expect from him good result on this tournament too. On the other hand Zverev come after very tough match in which he beat Isner in 3 sets and 3 tiebreaks played, so I think he could be tired and cannot play on so high level today. He is not playing so good lately, last week he was eliminated in the 2nd round of Indian Wells and before that he lost in the first rounds of Marseille and Rotterdam so I doubt he could do so much here.