And here's what came out of it for David. He has been drawn into the top half, bottom (i.e. Federer's) quarter, of which this is the lower half:
 John Isner (USA) vs Alejandro Falla (COL)
Paolo Lorenzi (ITA) vs Nicolas Mahut (FRA)
Igor Andreev (RUS) vs [WC] Oliver Golding (GBR)
Denis Istomin (UZB) vs  Andreas Seppi (ITA)
 Mikhail Youzhny (RUS) vs Donald Young (USA)
[Q] Inigo Cervantes (ESP) vs Flavio Cipolla (ITA)
[Q] Ryan Sweeting (USA) vs Potito Starace (ITA)
David Nalbandian (ARG) vs  Janko Tipsarevic (SRB)
A look at the complete draw you can take here.
Against his opponent in the first round, Janko Tipsarevic, David has already played twice this year. At Indian Wells, David defeated him in three sets but then lost to him in straights at Miami. Perhaps needless to say, they have never met on grass. A difficult first round for David, though it has to be said that it could've been worse.
David won't be playing at Boodles today.
Edit: And apparently also not on Saturday.