Ulster prop Simon Best has been ruled out of Ireland's tour of New Zealand and Australia after suffering a broken ankle.

Best sustained the injury during the 12-12 draw in Llanelli last night, a result that moved Mark McCall's side within touching distance of the Celtic League title, and faces a lengthy spell on the sidelines.

"This is a major blow to us and to Simon, particularly with the Ireland tour coming up," McCall said. "He has had a wonderful season and has led from the front on the field, as well as being inspirational off the field."

The 28-year-old, who has won 12 Ireland caps, will also miss next Friday night's final Celtic League clash against the Ospreys. A win will guarantee Ulster the title but Leinster, two points behind in the table, have not given up the ghost and will be aiming for full points in Edinburgh.

Both games have a 7.10p.m. kick-off.