of Latvia suffered a shock 3rd round defeat at the ATP event in LA at the hands of the Columbian, Alexander Fall in a final set tiebreaker.
Falla almost pulled off a huge upset earlier this year when he took the former world number 1 Roger Federer to set 5 sets in the 1st round of Wimbledon.
Gulbis has been in good form this year he reached a Semi Final of a Masters 1000 event for the 1st time in his career where he beat Federer before losing to eventual champion Rafael Nadal in the Semi Finals in 3 sets.
Last year Federer lost in the US Open final in 5 sets to the Argentine Juan Martin Del Potro, it was a 1st Grand Slam title for Del Potro who won the match 3-6 7-6 4-7 7-6 6-2. In the Semi Finals Del Potro beat Nadal in straight sets.