HOW TO FOLLOW THE ACTION
Live coverage on RTÉ2 and the RTÉ Player from 12.30pm
You can follow the match with our live blog on RTÉ Sport Online and the RTÉ News app.
The top two clash in Group I
It doesn't get much tougher than this for Vera Pauw's Republic of Ireland.
With three games to go in their Euro 2022 qualification campaign, the Girls in Green are top of Group I - but they've yet to face the Germans, who've absolutely run riot so far.
Ireland have played five, won four and drawn one to sit a point ahead of Germany, who have a game in hand.
Pauw's side have given themselves every chance of at least taking second spot, which could be enough to gain automatic qualification. The nine group winners and the three best runners-up (not counting results against the sixth-placed team) qualify directly, with the remaining six runners-up heading for the play-offs.
They'll relish the opportunity to square up to one of the finest outfits around in Essen on Saturday lunchtime.
Germany have scored 31 goals and conceded none. The eight-time European Championship winners are second in the FIFA World Rankings [Pauw believes they are in fact the best team on the planet right now], while Ireland are 31st.
Germany's only defeat in their last 24 matches came against Sweden in the 2019 World Cup quarter-final.
Attempting to overcome a powerful aura
The Germans have beaten Ireland on the four other occasions they've met, most recently in September 2014.
The danger for Ireland is that they show their opponents too much respect; they are, after all, facing a side who beat Montenegro 10-0.
"We have been doing background work for the last month looking ahead at different games, so we've done a bit of work but of course we have this whole week to prepare for this game, so that's the most important thing," attacker Heather Payne said in the build-up.
Boss Pauw doesn;t need to be told how good their hosts are but she will be banking on the three members of the Ireland squad who play their club football in Germany - Diane Caldwell (SC Sand), Claire O'Riordan (MSV Duisburg), and Amber Barrett (FC Koln) - to offer some assurance.
Pauw has no fresh injury concerns. Midfielder Megan Connolly is in the frame after missing the last three games, while Payne and Leanne Kiernan are also back after missing the last camp in March with injuries.
Midfielders Alli Murphy and Ellen Molloy are included in the squad following first senior call-ups.
Ireland go to Ukraine next month before finishing off with a showdown against the Germans on 1 December.
Goalkeepers: Merle Frohms (Eintracht Frankfurt), Laura Benkarth (Bayern Munich), Ann-Katrin Berger (Chelsea)
Defenders: Kathrin Hendrich (Wolfsburg), Leonie Maier (Arsenal), Marina Hegering (Bayern Munich), Lena Oberdorf (Wolfsburg), Giulia Gwinn (Bayern Munich), Felicitas Rauch (Wolfsburg), Sophia Kleinherne (Eintracht Frankfurt)Midfielders: Svenja Huth (Wolfsburg), Dzenifer Marozsan (Lyon), Sara Dabritz (Paris Saint-Germain), Melanie Leupolz (Chelsea), Lina Magull (Bayern Munich), Sydney Lohmann (Bayern Munich), Lena Lattwein (Hoffenheim), Paulina Krumbiegel (Hoffenheim)
Forwards: Lea Schuller (Bayern Munich), Alexandra Popp (Wolfsburg), Laura Freigang (Eintracht Frankfurt), Sandra Starke (Freiburg), Tabea Wabmuth (Hoffenheim)
REPUBLIC OF IRELAND
Goalkeepers: Marie Hourihan (SC Braga), Courtney Brosnan (West Ham United), Niamh Reid-Burke (Peamount United)
Defenders: Harriet Scott (Birmingham City), Louise Quinn (Fiorentina), Diane Caldwell (SC Sand), Claire O'Riordan (MSV Duisburg), Aine O'Gorman (Peamount United)
Midfielders: Niamh Fahey (Liverpool), Jamie Finn (Shelbourne), Denise O'Sullivan (Brighton & Hove Albion), Alli Murphy (London City Lionesses), Niamh Farrelly (Peamount United), Megan Connolly (Brighton & Hove Albion), Hayley Nolan (London City Lionesses), Ruesha Littlejohn (Leicester City), Ellen Molloy (Wexford Youths)
Forwards: Katie McCabe (Arsenal), Heather Payne (Florida State University), Leanne Kiernan (West Ham United), Amber Barrett (FC Koln), Rianna Jarrett (Brighton & Hove Albion), Kyra Carusa (HB Hoge)
Referee: Monika Mularczyk (Poland)
17 September, 2014: Germany 2-0 Republic of Ireland
5 April, 2014: Republic of Ireland 2-3 Germany
26 August, 2006: Republic of Ireland 0-3 Germany
10 May, 2006: Germany 1-0 Republic of Ireland
GROUP I FIXTURES
19 September: Germany v Republic of Ireland
22 September: Montenegro v Germany; Ukraine v Greece
21 October: Greece v Montenegro
22 October: Ukraine v Republic of Ireland
26 October: Greece v Ukraine
26 November: Germany v Greece
30 November: Ukraine v Montenegro
1 December: Republic of Ireland v Germany
Follow the Republic of Ireland's UEFA Women's Euro 2022 qualifier against Germany this Saturday (12.30pm) on our live blog on RTÉ Sport Online and the RTÉ News app or watch live on RTÉ2 and RTÉ Player.