German Nicolas Kiefer is preparing to participate in the Davis Cup tie between his native Germany and Spain. He replaces the unfit Tommy Haas to join Philipp Kohlschreiber in singles. This is Kiefer’s first Davis Cup since February 2006.

The tie will be contested on a fast indoor court in Bremen.

Follow up: See the rest of the Davis Cup line-ups here.

It’s not just Roger… Kiefer has his own set of caps from Diadora embroidered with his initials…

and with this nickname, Kiwi.

(photos by Getty Images)

Guga Kuerten lost his first round match against Sebastien Grosjean in the first round of the Sony Ericsson Open. The scoreline: 6-1, 7-5.

While his game might not have held up, his fashion sense sure did. He wore a bright orange/red kit (with red hat, red shoes) from Diadora Guga Kuerten. Le sigh, we’ll sure miss his flair when he retires.

In doubles, he wore white and won one match with Nicolas Lapentti against Feliciano Lopez and Fernando Verdasco. They lost in the next round to Aspelin and Knowles.

Lapentti also presented Kuerten with an award at an ATP banquet during the tournament.

Looking forward: Kuerten’s next stop on his farewell tour is a Challenger-level tournament in Florianopolis, Brazil. That event begins on April 14.

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(photos by Getty Images)

Luis Horna (left) and Agustin Calleri squared off at last week’s Copa Telmex in Buenos AIres.

Horna, in Reebok, put on a simple silver necklace, while Calleri, in Diadora, had on a wristband with thick, monochrome vertical stripes.

(BTW, Calleri beat Horna 3-6, 6-2, 6-2.)