Acasuso isn't an option, since he already withdrew. Taking a look at the Top 30 players of the entry list, then I'd say that the following players could be acceptable first round opponents for Kiefer:
3 Davydenko, Nikolay RUS 3 !!!!!!!!!!!!!!!!!!!!!!
7 Robredo, Tommy ESP 7
(8 Ljubicic, Ivan CRO 8) --> if he continues to disappoint
14 Ferrer, David ESP 14
20 Ferrero, Juan Carlos ESP 19
21 Canas, Guillermo ARG 20
22 Chela, Juan Ignacio ARG 21
26 Hrbaty, Dominik SVK 25
27 Safin, Marat RUS 26
29 Andreev, Igor RUS @27
30 Calleri, Agustin ARG 28
So of course mostly claycourters. Hopefully I won't get punished by Davydenko for this post by him winning in straights against Kiefer in 1st round.
