John Isner (USA) vs. Philipp Kohlschreiber (GER) – Isner has won all 4 of their matches not played at the US Open. Kohlschreiber has won all 3 of their matches played at the US Open. Isner has demonstrated solid form in recent events, but I think his game is one dimensional enough that Kohlschreiber can win this match if he is prepared to grab a few return points in the inevitible tie-break sets that will occur.
Alexander Zverev (GER) vs. Viktor Troicki (SRB) – Zverev is supposed to be the next big thing. This seems like a winnable event to add momentum to his 2017 campaign.