Poland occupied the top placing after the first day's play at the International University Sports Federation (FISU) World University Bridge Championships in the Chinese city of Xuzhou.
Two of the three home teams taking part occupy second and third positions, with the Czech Republic lying fourth, one place above Belgium.
Six rounds of competition were completed at the Wyndham East Hotel, and three more days of the event remain during which each team will take part in 18 rounds.
The competition consists of ten teams from eight countries including Poland, Belgium, Japan, Comoros, Czech Republic, Serbia, Thailand and China, with 63 athletes and officials involved.
The three home teams are drawn from Shanghai Jiaotong University, Fudan University, Zhejiang University, Shandong University, Sichuan University, Shanghai University of Finance and Economics and Xuzhou University of Technology.