Rugby analyst Matt Williams looks at the strengths and weaknesses of the two hookers

BRIAN BLANEY vs JERRY FLANNERY

THROWING: Neither is great. The saying "couldn't hit an elephant's backside with the wrong end of a banjo" comes to mind. Both teams place massive emphasis on defensive lineouts, so accuracy is vital. The hooker that has a good day will provide his team with that vital edge. Munster will try to get after young Blaney to negate the impact of the Leinster backs by denying them possession. Leinster have three big men of their own to cause Munster problems.

BALL CARRYING: Both are excellent in this regard. Flannery likes to roam farther from traditional forward channels and is thoroughly comfortable in that context. He's dynamic and isn't afraid of the wide-open spaces. Blaney opts for the more traditional areas of the pitch, looking for work to carry ball on the fringes, and is adept in that respect.

TACKLING: Given their mobility and athleticism this is a facet of the game in which both excel. Flannery is slightly smaller in stature than many of his international contemporaries so he is not going to be a punishing tackler in terms of big hits. Blaney is in his first season as a full-time professional, has a big frame and is going to continue developing physically. He occasionally displays a tendency to go high and drag down rather than go for the more orthodox method.

IN THE LOOSE: In many respects they are excellent players without being world class in terms of their specialist roles as hookers. When Munster look to catch and drive at lineout time, Flannery protects the ball at the back and is last man and ball carrier. It's the same thing for Blaney, who fulfils the exact identical role. Flannery is probably more at home when taken outside the traditional environment of hooking duties.

WORK-RATE: Once again it is impossible to cavil with either, as their appetites are voracious. Flannery is the epitome of perpetual motion, whether with the ball or in defence. Blaney is a little more considered and dutiful to the slog at the coalface.

The player that provides the best manifestation of the specialist hooker role will give his team the edge. Blaney's talent is indisputable but he is almost a rookie as a starting European player. The challenge for him will be to banish self-doubt. Flannery will benefit from the Test experience he has had. A pretty even tussle, with lineout throws by Blaney the key.