England number eight Billy Vunipola said he would need to step up his game in Saturday's Six Nations clash at Wales in the absence of his brother Mako Vunipola and Maro Itoje due to injuries.

Prop Mako sustained an ankle injury in England's 44-8 win over France ruling him out of the tournament while lock Maro Itoje has not recovered from a knee injury.

"It'll be tough because we're missing my brother though we have great players to replace him," said Vunipola.

"Also, we're missing Maro so it's probably a good week for me to try and play a better game than I have been in the last two weeks."

Injuries have plagued the 26-year-old in the last few months, with three arm fractures apart from shoulder and knee issues stalling his progress.

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But the younger Vunipola believes his steady improvement in recent weeks can help him deliver a good performance in Cardiff.

"I've been okay. I've been out of the international fold on a consistent basis for a while. I think it is important that I try and have a good game on Saturday," he added.

"I do feel there is more to come. It's easy when you are in this environment to have the best foods and drop a little bit of weight... I've dropped a few kilos so hopefully I can produce something close to my best at the weekend."