"The Canberra season where we went through undefeated and then won, that was epic," she said.

The Kalgoorlie-born shot stopper becomes the second player this round to join the 100 club but she also is the first goalkeeper to reach the milestone.

"It hasn't happened to a lot of players and the significance is amazing obviously," Williams said.

"You see other girls from different countries getting their 100th cap and I think to recognise the W-League that is pretty cool," she said.

It hasn't been the best start to the season for City, who currently sit in seventh having just a single win to their name this season.

So a win against the Newcastle Jets would put the cherry on top of the cake for Williams in her milestone match.

"You always go through things in life that mean something to you, to get a win in such a monumental way and personal achievement that would be amazing," Williams said.

"Whilst it is amazing for me as I have been going through the season, to get a win, in general, would be great," she said.

Catch Lydia William's milestone match from 2:30pm at McDonald Jones Stadium or on Fox Sports 505 and SBS Viceland.