HAMBURG, Germany (AFP) - Nicolas Kiefer on Thursday became the first German this century to make the quarter-finals of the Hamburg Masters when he joined Roger Federer and Novak Djokovic in the last eight.

Before Kiefer's third-round upset of fourth-seed Nikolay Davydenko, Tommy Haas at the 1999 tournament had been the last German to achieve the feat.

Kiefer's 7-5, 6-3 win over the Russian means there will be huge support in the Am Rothenbaum stadium for Friday's quarter-final against Italy's Andreas Seppi.

Kiefer, 41 in the ATP rankings, came out on top against the world number four after one hour and 54 minutes having also beaten last week's Rome finalist Stanislas Wawrinka in the second round.

Defending champion Federer booked his place in the quarter-finals after beating Sweden's Robin Soderling 6-3, 6-2 in just one hour six minutes.

"I was happy with the match, I controlled things well from the baseline and I feel comfortable here," said Federer who has won four of the last six tournaments in Hamburg.

"I have been doing well here since 2002, I struggled for a few years before that, but I have had so much success here since then. Germany is similar to Switzerland and it helps to be in familiar surroundings.

"I feel good in myself, I have played a lot of tennis this year, but I am not feeling jaded or carrying any injuries.

"I am looking forward to Roland Garros and then Wimbledon before I have a rest."

Having beaten Spain's Rafael Nadal in last year's final, Federer will now meet Spain's Fernando Verdasco in Friday's last eight.

Australian Open winner Djokovic, who set up a quarter-final clash with Spain's Albert Montanes, is on course to meet clay-court king Nadal if the pair both make it to Saturday's semi-finals.

Djokovic had few problems as he saw off Croatian giant Ivo Karlovic 7-6 (7/3), 6-3.

"It's never easy to play Karlovic," said the 20-year-old.

"We all know he has one of the best serves on tour, but I was happy with the way the match went.

"I don't know much about Montanes, but he must be a quality player if he can get this far in this competition. He has nothing to lose and I will have to be aggressive to get the win."

Earlier, seeded pair Argentine Juan Monaco and Spain's David Ferrer both crashed out.

Italy's Seppi made the last eight after he removed his second consecutive seed from the draw with a 6-0, 6-3 win over 12th seed Monaco.

And fifth seed Ferrer went out when he was beaten 7-6 (7/4), 6-2 by Verdasco.