Czech player Petra Kvitova defeated Kirsten Flipkens 6-2, 7-6 (4) in the opening match. Yanina Wickmayer pulled the host nation into a tie with a 6-4, 6-4 win over Barbora Zahlavova Strycova.
The reverse singles and doubles are scheduled for Sunday.
Belgium is playing without Kim Clijsters, who injured her ankle at a wedding last week.
The winner of the match will play either Russia or Italy in the final on Nov. 5-6. Russia leads Italy 2-0.