After Iran had lost 6-2 to England on Monday, Wales came from behind to earn a deserved share of the spoils against USA later in the day.
Match preview
After England had thrashed Iran, Wales and USA went into their respective game in Al Rayyan knowing that they could ill-afford defeat, and a 1-1 draw would have been the most popular prediction pre-match.
Nevertheless, neither side particularly played in a manner where they were settling for a point, and Wales were fortunate to still be in the contest come the half-time whistle.
In the second half, it was a different story, the Dragons squandering a number of openings before Gareth Bale scored his first-ever World Cup goal from the penalty spot.
While Wales' star man was below his influential best, his confident effort from 12 yards has put Wales in a position where their fate will be in their own hands if they can defeat Iran.
However, despite the draw being regarded as a point gained in the grand scheme of things, Robert Page's side are now winless in six outings and have only prevailed once in nine matches.
Form counted for little as Iran were thoroughly outclassed by England, Carlos Quieroz's side looking a shadow of the team that had previously collected a win and a draw from Uruguay and Senegal in September.
To Team Melli's credit, they never gave up and scored two consolation goals in the final quarter, the second coming from an extremely debatable penalty decision based on the threshold which had been used previously in the match.
Mehdi Taremi's double highlighted his threat in the attack, and a substitute outing from Sardar Azmoun after injury will only encourage Iran ahead of this contest.
Despite the presence of the aforementioned duo, Iran have not netted more than twice in a game in nine attempts, something which is ideally required as they look to reduce their negative difference.
Wales World Cup form:
D
Wales form (all competitions):
L
D
L
L
L
D
Iran World Cup form:
L
Iran form (all competitions):
L
W
D
W
L
L
Team News
Page has a number of selection dilemmas ahead of this encounter, including whether to include Kieffer Moore from the start after his impact against USA.
Although Daniel James would be favourite to drop out, Page may want to manage fitness levels, with Harry Wilson also in contention to drop to the substitutes' bench.
Ethan Ampadu's ankle knock will be monitored, with Joe Morrell on standby to deputise, while Joe Allen may come into consideration for a substitute appearance despite not featuring since September due to injury.
Iran will be forced into a change between the sticks due to concussion protocols after Alireza Beiranvand's head injury against England.
Hossein Hosseini is in line to take his place, and Quieroz has a decision to make over whether to start Azmoun from the opening whistle.
Although three changes were made at the break on Monday, Quieroz may favour familiarity, although Ali Gholizadeh will hope for a start after supplying the assist for Taremi's first goal.
Wales possible starting lineup:
Hennessey; Mepham, Rodon, Davies; Roberts, Ramsey, Ampadu, Williams; James, Bale; Moore
Iran possible starting lineup:
H.Hosseini; Moharrami, Pouraliganji, Cheshmi, M.Hosseini, Mohammadi; Jakanbakhsh, Noorollahi, Karimi, Gholizadeh; Taremi
We say: Wales 1-1 Iran
Based on performances earlier this week, Wales will be regarded as the marginal favourites for this contest. However, with Iran having more recovery time and playing at a time of the day which should benefit them, we can see a competitive low-scoring draw being played out in Al Rayyan.