Discipline key for Ulster, says McFarland

When Ulster last met Scarlets two weeks ago in Llanelli, they spent two-thirds of the game defending wave after wave of red jerseys charging towards their line.

Only for some remarkable big hits, included in their 251 tackles made during that onslaught, they would have been hammered more than the 29-12 scoreline that favoured the home side in that PRO14 game.