World champion gymnast Diego Hypolito from Brazil has to undergo knee surgery.

The operation is a right-knee arthroscopy which will put him out of action for four weeks.

“We don’t know exactly when the injury happened,” his coach Renato Araujo said. “He began feeling the pain last Friday and medical exams showed the surgery was necessary.”

“Obviously it will be a problem,” Araujo said. “He will have to miss training sessions, and practice time is always important. He will have to overcome this.”

Hypolito is two time world championship in the floor exercise and is among the favorites to win the event at the Beijing Olympics.

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