Badminton World Federation (BWF) has opened two disciplinary cases against four women's pairs who contested the doubles matches in the London Olympics Tuesday evening at the Wembley Arena.

The pairs from Indonesia, South Korea and China, have been charged under BWF's Players' Code of Conduct. According to sections 4.5 and 4.6 of the code, "not using one's best efforts to win a match" and "conducting oneself in a manner that is clearly abusive or detrimental to the sport" will not be allowed.

The players charged include Wang Xiaoli and Yu Yang from China, Meiliana Jauhari and Greysia Polli from Indonisia, as well as Jung Kyung Eun and Kim Ha Na, Ha Jung Eun and Kim Min Jung from South Korea.

BWF's disciplinary committee will hold a formal hearing Wednesday morning, after which a decision will be made.

Substandard performances of these players were booed when they missed services and shots from each other.