Saudi Arabia produced one of the great World Cup shocks as they kicked off their group-stage campaign by beating Argentina last time out.
And, against all the odds, they will be into the knockout stages with a game to spare should they claim another scalp in beating Poland next up.
The Poles were left ruing a missed penalty from Robert Lewandowski as they were held to a 0-0 draw by Mexico in their first game.
They know that victory is vital if they are to have hopes of making the Round of 16 themselves.
Below are the predicted lineups for both teams.
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Poland vs Saudi Arabia confirmed lineups
Poland coach Czeslaw Michniewicz has hinted that he is ready to go all-out attack as Poland look to improve on their drab draw with Mexico.
Speaking at a press conference ahead of the game, the 52-year-old declared: "We want to play forward and play bolder. We're ready to play our way. I think there are two equal teams."
It has been suggested that a change of formation could be on the cards for Poland for that reason, with Arkadiusz Milik set to be benefit.
The inclusion of another striker would certainly help avoid Barcelona man Lewandowski being left as isolated as he was in his country's opening game.
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Poland confirmed starting 11
Poland (4-1-3-2 right to left): 1. Szczesny (GK) — 2. Cash, 14. Kiwior, 15. Glik, 8. Bereszynski — 10. Krychowiak —24. Frankowski, 20. Zielinski, 6. Bielik — 9. Lewandowski, 7. Milik
- Injured: none
- Suspended: none
Krystian Bielik and Bartosz Bereszynski picked up knocks during the draw with Mexico but were fit to start for Poland.
Przemyslaw Frankowski is also part of the starting lineup.
Saudi Arabia confirmed starting 11
Saudi Arabia (4-5-1, right to left): 21. Al-Owais (GK) — 12. Abdulhamid, 17. Al Burayk, 5. Al-Boleahi, 3. Madu — 9. Al-Buraikan 23. Kanno, 8. Al-Malki, 7. Al-Faraj, 10. Al-Dawsari — 11. Al-Shehri
- Injured: Yasser Al-Shahrani
- Suspended: none
Saudi Arabia are without Yasser Al-Shahrani after he was forced to undergo surgery following a sickening clash with his own goalkeeper during the win over Argentina.
Poland vs Saudi Arabia World Cup squads
Here are the 26 names on each team's squad lists at the World Cup in Qatar:
Poland
| Position | No. | Player | Club | Age | Caps |
|---|---|---|---|---|---|
| GK | 1 | Wojciech Szczesny | Juventus (ITA) | 32 | 66 |
| GK | 12 | Lukasz Skorupski | Bologna (ITA) | 31 | 8 |
| GK | 22 | Kamil Grabara | Copenhagen (DEN) | 23 | 1 |
| DEF | 5 | Jan Bednarek | Aston Villa (ENG) | 26 | 45 |
| DEF | 15 | Kamil Glik | Benevento (ITA) | 34 | 99 |
| DEF | 2 | Matty Cash | Aston Villa (ENG) | 25 | 7 |
| DEF | 14 | Jakub Kiwior | Spezia (ITA) | 22 | 3 |
| DEF | 25 | Robert Gumny | FC Augsburg (GER) | 24 | 5 |
| DEF | 18 | Bartosz Bereszynski | Sampdoria (ITA) | 30 | 46 |
| DEF | 4 | Mateusz Wieteska | Clermont (FRA) | 25 | 2 |
| DEF | 3 | Artur Jedrzejczyk | Legia Warsaw (POL) | 34 | 40 |
| MID | 21 | Nicola Zalewski | Roma (ITA) | 20 | 7 |
| MID | 26 | Michal Skoras | Lech Poznan (POL) | 22 | 1 |
| MID | 10 | Grzegorz Krychowiak | Al Shabab (SAU) | 32 | 94 |
| MID | 20 | Piotr Zielinski | Napoli (ITA) | 28 | 74 |
| MID | 6 | Krystian Bielik | Birmingham (ENG) | 24 | 5 |
| MID | 11 | Kamil Grosicki | Pogon Szczecin (POL) | 34 | 87 |
| MID | 24 | Przemyslaw Frankowski | Lens (FRA) | 27 | 26 |
| MID | 19 | Sebastian Szymanski | Feyenoord (NED) | 23 | 18 |
| MID | 8 | Damian Szymanski | AEK Athens (GRE) | 27 | 9 |
| MID | 17 | Szymon Zurkowski | Fiorentina (ITA) | 25 | 7 |
| MID | 13 | Jakub Kaminski | Wolfsburg (GER) | 20 | 4 |
| FWD | 23 | Krzysztof Piatek | Salernitana (ITA) | 27 | 11 |
| FWD | 16 | Karol Swiderski | Charlotte (USA) | 25 | 18 |
| FWD | 7 | Arkadiusz Milik | Juventus (ITA) | 28 | 64 |
| FWD | 9 | Robert Lewandowski | Barcelona (SPA) | 34 | 134 |
Saudi Arabia
| Position | No. | Player | Club | Age | Caps |
|---|---|---|---|---|---|
| GK | 21 | Mohamed Al-Owais | Al Hilal (KSA) | 31 | 33 |
| GK | 22 | Nawaf Al-Aqidi | Al Nassr (KSA) | 22 | 0 |
| GK | 1 | Mohammed Al-Yami | Al Ahli (KSA) | 25 | 7 |
| DEF | 13 | Yasser Al-Shahrani | Al Hilal (KSA) | 30 | 61 |
| DEF | 5 | Ali Al-Boleahi | Al Hilal (KSA) | 32 | 28 |
| DEF | 4 | Abdulelah Al-Amri | Al Nassr (KSA) | 25 | 13 |
| DEF | 3 | Abdullah Madu | Al Nassr (KSA) | 29 | 12 |
| DEF | 17 | Hassan Tambakti | Al Shabab (KSA) | 23 | 11 |
| DEF | 2 | Sultan Al-Ghannam | Al Nassr (KSA) | 28 | 17 |
| DEF | 6 | Mohammed Al-Burayk | Al Hilal (KSA) | 30 | 28 |
| DEF | 12 | Saud Abdulhamid | Al Hilal (KSA) | 23 | 14 |
| MID | 7 | Salman Al-Faraj | Al Hilal (KSA) | 33 | 56 |
| MID | 26 | Riyadh Sharahili | Abha (KSA) | 29 | 2 |
| MID | 15 | Ali Al-Hassan | Al Nassr (KSA) | 25 | 9 |
| MID | 23 | Mohamed Kanno | Al Hilal (KSA) | 28 | 25 |
| MID | 8 | Abdulelah Al-Malki | Al Hilal (KSA) | 28 | 16 |
| MID | 16 | Sami Al-Najei | Al Nassr (KSA) | 25 | 14 |
| MID | 14 | Abdullah Otayf | Al Hilal (KSA) | 30 | 37 |
| MID | 24 | Nasser Al-Dawsari | Al Hilal (KSA) | 23 | 8 |
| MID | 20 | Abdulrahman Al-Obood | Al Ittihad (KSA) | 27 | 1 |
| MID | 10 | Salem Al-Dawsari | Al Hilal (KSA) | 31 | 53 |
| MID | 19 | Hattan Bahebri | Al Shabab (KSA) | 30 | 30 |
| FWD | 25 | Haitham Asiri | Al Ahli (KSA) | 21 | 4 |
| FWD | 11 | Saleh Al-Shehri | Al Hilal (KSA) | 29 | 10 |
| FWD | 9 | Firas Al-Buraikan | Al Fateh (KSA) | 22 | 20 |