Six Nations preview: Who can stop Ireland winning three titles in a row?

The Six Nations tournament kicks off with a Welsh trip to the Stade de France on Friday, before favourites Ireland begin their title defence against England, aiming for a historic third consecutive trophy. Here's how the teams compare going into the first round of matches.

Six Nations preview: Who can stop Ireland winning three titles in a row?
The Six Nations tournament kicks off with a Welsh trip to the Stade de France on Friday, before favourites Ireland begin their title defence against England, aiming for a historic third consecutive trophy. Here's how the teams compare going into the first round of matches.