Roger Federer safely made it to the quarter-finals of the German Tennis Championships with a straight-sets victory over Jan Hajek.
The number one seed needed just one hour and 11 minutes to complete a 6-4 6-3 triumph at the ATP 500 clay-court event in Hamburg on Thursday.
Federer, who is looking for his fifth title at the tournament, broke the Czech qualifier twice in the first set, and despite losing a service game of his own, comfortably took the opener.
The second was similarly straightforward for the Swiss, breaking once and allowing his opponent no opportunities to return the favour.
Next up for Federer is German Florian Mayer for a place in the semi-final after he beat 11th seed Feliciano Lopez.
The world number 45 took the first set on a tie-break before a comfortable second earned him a 7-6 (7-1) 6-2 triumph.
Second seed Tommy Haas set up a quarter-final showdown with Italian Fabio Fognini after dispatching of Argentinian Carlos Berlocq.
The German, backed by the home support, wrapped up a comfortable 6-2 6-4 success in one hour and 16 minutes.
Haas is looking to go one better than last year when he was defeated in the final by Argentinian Juan Monaco.
Fognini, seeded 12th, had no trouble in his match against Spain's Marcel Granollers as he came through 6-2 6-4.
Monaco continued the defence of his title after defeating ninth seed Benoit Paire.
The fifth seed recovered from losing the second set to the Frenchman to complete a 6-3 2-6 6-2 win. He will face third seed Nicolas Almagro for a place in the final four.
The 2011 runner-up defeated Spanish compatriot Guillermo Garcia-Lopez in a comprehensive 6-2 6-3 win.
Wimbledon semi-finalist Jerzy Janowicz was forced to retire from his match with 14th seed Fernando Verdasco.
The Pole was trailing 7-5 4-0 in his third-round match with the Spaniard when the tie was ended prematurely.
Verdasco will have to beat Argentinian qualifier Federico Delbonis if he wants to reach the semi-finals.
The world 114 produced a very impressive 6-4 6-3 win over Russia's Dmitry Tursunov, a result that follows his victory against Tommy Robredo in round two.