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This season Kulda doesn't have a Top 50 win. He lost seven games to Del Potro, Dimitrov, Kukushkin and Thiem. Kohlschreiber can fit into that group too. Even though he's not a routiner, the numbers clearly suggest for -4. The German this and last season has covered three times and has one void on ATP level of hardcourt wins. He covered them against Coric, Ilhan and Smyczek. The last one he beat with eight games of difference, exactly here, which is good comparison. Kudla, in hardcourt ATP losses, at +4 has covered only once in 10 atches. He covered it only against Rola, but at the time he was the favorite (@1.5). Here he beat Istomin whose record this season is 0-7. Even he did a series of six won games in a row. Simply put, nothing suggest that Kudla should resist more this season. He took Kukushkin and Dimitrov into overtime, and still lost with seven games of difference. That's why I like this so much. Even if he complicates things, the German should win one set convincingly, and that means he'll pass. In the last five years, on ATP losses on hardcourt, Kudla only twice covered +4. In 17 matches (he did the void twice), and he was defeated by far weaker players than the German is.