Kind of thought Sela would be the favorite here, but he's a small dog. Sela has been in pretty nice form with some decent wins in the last two weeks (Rosol, Lacko) and lost a 3rd set tiebreak vs Isner. I know Isner is just coming back, but the impressive thing about the stats is that Isner only won 41 of 62 points when getting his 1st serve in (68%) and converted 3 of 7 break points. Telling me he's returning fairly well. On the other side, Falla hasn't played much lately, retired in his last 2 tournaments (hamstring and back) and needed tiebreaks in qualies to get past guys ranked close to 400 in the world. Falla holds a 3-0 h2h, but they haven't played in 6 years.