Biggar sat out Wales' last two games after sustaining a pectoral muscle injury in the 40-6 win over Australia last month, in the pool phase of the tournament in France.
"It was one I really didn't want to miss and I'm lucky and grateful to be sat here," he told a press conference on Friday."I'm alright. I just managed to get back last week, sitting on the bench. I thought it might be difficult but it's healed up well," he said of the injury. "We've got to manage expectations. I think a lot of people think we can just turn up and win. That's not the case. We need to deliver a really good performance. We're playing a tough team who probably have more to come," he said."I don't want my last day as a Welsh player to be losing a quarter-final and I'm not thinking about this as potentially my last Wales game," he insisted.
"We're not quite ready to go home. It's funny how time changes. If someone had said we'd win our pool and be a strong position three or four months ago, you'd think they were talking madness," he added.
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