After playing in two Tests for the British & Irish Lions on their summer tour of South Africa, Williams was taken ill with appendicitis in pre-season with his region Scarlets.
It meant he has played only one game so far this season. His first appearance came off the bench in last Saturday’s narrow 23-18 defeat by the Springboks.
Now Williams is ready to begin a game from the off against a dangerous Fiji outfit.
“I can’t wait to get back out there and I have a chance to play 15 again,” Williams said.
“Johnny McNicholl has played well over the first couple of games, but I am happy to get that shirt back.
“Hopefully we can put in a good team performance. People expect us to win by a large amount, but that’s not us. We just want to win – it doesn’t matter if it’s by one point or 101 points.”
Looking back on the South Africa game, Williams added: “Last weekend it was one of those games that got away. We should have won that game.
“I thought our defensive effort and the boys were amazing – we just couldn’t quite close it out. This weekend is a must-win for us after losing a couple on the bounce.
“Now we need to get back to winning ways and hopefully a win will get us in a good place for Australia next weekend. Fiji are always a very dangerous team.
“You never know what they are going to do, what they’re going to throw at you, or what offloads they’re going to do.
“They’re fantastic with ball in hand and they hit hard. No doubt I’m sure to be cut in half once or twice!”
Williams is now back fit after appendicitis but was forced to quickly undergo surgery to have his appendix removed.
“I have hardly played for Scarlets since I came back with three games in the space of a year,” Williams said.
“The red card against Cardiff was on me, but there is not much I can do with other stuff like injuries. I have just been unfortunate over the last year. I am back fit now and looking to stay fit for a while.
“It was not ideal having to have my appendix out right at the start of pre-season, but I can’t change any of that. It was strange and it came out of the blue.
“I trained on the Monday and had food with my fiancée Sophie and her mum and dad. In the middle of food, I had a bit of a sore stomach and had to go outside a couple of times because I was sweating. It was not normal.
“The pain was above my belly button and at around 8.30pm, I went up to bed because I was not feeling right.
“I text Matthew Rees the Scarlets head of medical and said I was not feeling too well. He said to come in on Tuesday and by then the pain had gone from my belly button to the bottom right which is the normal sign of appendicitis.
“I went for a scan and luckily, I took an overnight bag because they kept me in and I had my operation on the Wednesday morning.
“I was pretty much in the house for two weeks going from my bed to the sofa and back again in agony.
“The pain was pretty extreme straightaway. The first week was hell.
“I had been off for six weeks after the Lions. I trained for the last two weeks of those six weeks and then I was ill on my first day back at the Scarlets. I was off for another four weeks and could not do any weights.
“I did not lose any weight thankfully, but you lose a bit of strength and power.”
