Tadhg Beirne believes he and Ireland are still some way from hitting top form at the Rugby World Cup as they bid to avoid being scalped by Tonga.The towering Munster forward is "gunning" to retain his starting spot for Saturday's Pool B clash following a two-try turn in last weekend's 82-8 thrashing of Romania.Head coach Andy Farrell may opt to rotate his team in Nantes ahead of a crunch Paris showdown against reigning champions South Africa.

Tadhg Beirne believes he and Ireland are still some way from hitting top form at the Rugby World Cup as they bid to avoid being scalped by Tonga.The towering Munster forward is "gunning" to retain his starting spot for Saturday's Pool B clash following a two-try turn in last weekend's 82-8 thrashing of Romania.Head coach Andy Farrell may opt to rotate his team in Nantes ahead of a crunch Paris showdown against reigning champions South Africa.