Today, the Davis Cup week officially began at the Parque Roca with a another extensive doubles practice for David and Horacio Zeballos, playing against Guido Pella and Leo Mayer. But apart from training, David and the others also faced the assembled media at the Parque Roca's press room today.
Though David apparently also said that he's ready to play a live fifth rubber, if need be (source).
After (in the clip) Pico talks about that he may be the number one but that he feels like another member of the team and that this will be a difficult tie but they're united, it's David's turn again, who says he's happy to be part of the team again, and that they're in good shape and ready for the tie.
With Martin Jaite adding that this tie will be tougher then the last meeting between Argentina and Germany in Bamberg, last year. After all, the German team can rely on its number one this time.
In any case, it seems there's little doubt now that Pico and Charly Berlocq will play the singles, David and Horacio Zeballos will play the doubles, and in case there's a live fifth rubber then David could play that one, as well. While on the German side we can probably expect Philipp Kohlschreiber and Florian Mayer to play singles, and Kohlschreiber together with Christopher Kas for the doubles.