Maybe you've already seen it, on the ATP website, or on some other rankings page - as of today, David is ranked #50, thanks to his quarterfinal points from Indian Wells. It's the first time he has cracked the Top50 since dropping out of them last August (after losing in the first round at Washington). A big step ahead for David and one that he can continue to build on, as he won't have any points to defend, neither at Miami nor at the clay-court events in Europe. But most of all because after two injury-riddled seasons, he's now finally able to play a regular schedule again.
I have to continue on this path. I hope that my physical fitness doesn't let me down. I'm doing well, in terms of my tennis as well as physically. I keep getting better. (Source.)
Argentina's captain Martin Jaite has officially announced the line-up for the upcoming Davis Cup quarterfinal tie against Croatia (April 6-8 at the Parque Roca in Buenos Aires):
Juan Martin Del Potro
Apart from that, Juan Ignacio Chela has been named as a fifth (or reserve) nomination.
After initially there were rumours about Delpo not wanting to play this tie, he first announced his participation on Argentine TV during Indian Wells before calling Jaite yesterday to confirm that he will be part of the team (source). To quote Martin Jaite:
I'm happy about Juan Martin's return. Also about Nalbandian and his improving performance. (Source.)