With the way Davis Cup went, in addition to the first Grand Slam of the season, I think we can officially call the start to 2014 a disappointment. That's not to say there have not been promising moments. John Isner won the first ATP tour title for an American this season in Auckland, Eric Butorac made the finals of the Australian Open in doubles, Stefan Kozlov made the finals of the Australian Open in juniors, Bradley Klahn won a challenger title in Maui, and Wayne Odesnik won a challenger title in Chitre. So it could be worse... it could always be worse.
I think it's safe to say the negatives have outweighed the positives, though. The title in Auckland for Isner came at the expense of him being able to compete at the Australian Open or Davis Cup, and without him the lack of depth really showed. Only two Americans made it to the 3rd round of the Aussie (Donald Young and Sam Querrey) and they were both dispatched in routine straights. Those two would end up representing the Americans in San Diego.