Dependence on Sexton the chief concern, says Best 

DEPENDENCE: Ireland's Johnny Sexton. Pic: Andrew Matthews/PA Wire.

AS pumped up as Rory Best is for the Six Nations, he cannot get past one element. Now, probably more than ever, Ireland are absolutely at the mercy of Johnny Sexton.

The fly-half turns 38 in July, but Best sees him as not just the first option, but the only option.