There are quite a few rather mediocre or poor first-round match-ups, but then Klahn and Sweeting meet
Hopefully Ryan can win this event and get his ass back to the Top 100 where he belongs and would be if injury-free.
I think these 1R matches are interesting aswell:
Tim Smyczek USA  vs. Tsung-Hua Yang TPE
Denis Kudla USA  vs. Daniel Kosakowski USA
Donald Young USA vs. Michael Russell USA 
Mischa Zverev GER vs. Tatsuma Ito JPN