There's no confirmation yet as Jaite still has to officially announce his team but there are now increasing signs that David won't be nominated for the semifinal (source).
Apparently, David and Martin Jaite are meeting in Buenos Aires today.
Edit: And Jaite will also announce his nominations today, it seems.
While David will spend this week continuing his training back home, still hoping to be part of the doubles team for the Davis Cup semifinal, the other Argentine players as well as Martin Jaite and Mariano Zabaleta are in New York for the US Open.
And while the exact line-up for Prague is still unclear, especially when it comes to the doubles, there are three and a half Argentine pairs to be found in the US Open doubles draw: Charly Berlocq playing with Edu Schwank, Pico Monaco teaming up with Lucas Arnold Ker again and Federico Delbonis joining forces with Leo Mayer, whereas Horacio Zeballos will be playing with Pablo Cuevas from Uruguay.
In other words, at Flushing Meadows some alternatives for the doubles will be tested.
At the end of the week David and Martin Jaite will then get together in Buenos Aires again to make the decision about the semifinal. The nominations deadline is Tuesday next week, though Jaite is expected
to announce his team a week from now on Monday, September 2.