Venus Williams moved closer to a fifth title on Saturday as veteran Rainer Schuettler struck a blow for Germany against Spain on the eve of the Euro 2008 football final.
Four-time champion Williams was too strong for Spanish opponent Maria Jose Sanchez Martinez as she joined sister Serena in the last 16 with a 6-1, 7-5 win.
The reigning champion and seventh seed will face Russian Wimbledon debutant Alisa Kleybanova, who put out Japanese veteran Ai Sugiyama 6-4, 6-4 for a place in the quarterfinals.
With Sugiyama out, Asian hopes were left riding on Thai 31-year-old Tamarine Tanasugarn who staged a superb fightback to reach the fourth round for the seventh time with a 4-6, 6-4, 6-4 win over New Zealand's Marina Erakovic.
Russian fifth seed Elena Dementieva also went into the last 16 with a 7-6 (7/2), 7-5 win over Argentina's Gisela Dulko.
Meanwhile, Schuettler, the oldest man left in the men's draw at 32, reached the fourth round for the first time since 2003 with a 6-2, 6-3, 6-4 win over Spain's Guillermo Garcia-Lopez.