HAMBURG — Top-seeded Roger Federer cruised past Czech qualifier Jan Hajek 6-4, 6-3 to reach the German Tennis Championships quarterfinals Thursday. Second-seeded Tommy Haas also advanced by beating Carlos Berlocq of Argentina 6-2, 6-4. Juan Monaco, the fifth-seeded Argentine who beat Haas for the Hamburg title last year, defeated ninth-seeded Benoit Paire of France 6-3, 2-6, 6-2. Haas next plays Fabio Fognini of Italy, who beat Marcel Granollers of Spain 6-2, 6-4. Monaco plays third-seeded Nicolas Almagro, who beat Guillermo Garcia-Lopez 6-2, 6-3. Jerzy Janowicz of Poland was forced to retire with a right arm injury, allowing 14th-seeded Fernando Verdasco to advance. The Spaniard, who was leading 7-5, 4-0, will next play Argentine qualifier Federico Delbonis, who beat Dmitry Tursunov of Russia 6-4, 6-3. Serena in last 8 World No. 1 Serena Williams survived a late second set hiccup to move into the quarterfinals of the Swedish Open with a 6-2, 6-3 victory over Georgia's Anna Tatishvili. She now faces 32-year-old Spaniard Lourdes Dominguez Lino who came into the tournament ranked 54 in the world and seeking a third WTA victory, both on clay. Beck, Meusburger in quarters Annika Beck of Germany came from behind to beat Mandy Minella of Luxembourg 2-6, 6-4, 6-4 and reach her fifth quarterfinal of the season at the Gastein Ladies in Austria Thursday. Also, 2007 finalist Yvonne Meusburger of Austria defeated third-seeded Irina-Camelia Begu of Romania 6-3, 6-3. Meusburger will next play Arantxa Rus of the Netherlands, who rallied from a set and a break down to beat Estrella Cabeza Candela of Spain 5-7, 7-5, 6-3. Elina Svitolina of Ukraine beat sixth-seeded Chanelle Scheepers of South Africa 7-5, 1-6, 6-1 and will face Patricia Mayr-Achleitner in the last eight. — Agencies