Bolton says South Korea midfielder Lee Chung-yong has been ruled out for at least nine months after breaking his leg in a preseason friendly for the Premier League club.

The 23-year-old Lee underwent a successful operation on Saturday after his lower right leg was broken in two places during Bolton's 3-1 win at non-league Welsh club Newport earlier in the day.

Lee was carried off on a stretcher during the first half following a challenge from Tom Miller.

Manager Owen Coyle says Lee will get ''all the support he needs, as now it is all about his recovery and well-being. That is the most important thing.''

Lee joined Bolton from FC Seoul two years ago.