Cardiff's Premier League promotion came more than a month after playing a major role in the Azkals' qualification to the Asian Cup for the first time with a 2-1 victory over Tajikistan at the Rizal Memorial Stadium.
Fulham slipped up at St Andrew's, losing to struggling Birmingham, meaning Cardiff could secure the promotion regardless of the result in South Wales.
Keep up to date with updates throughout the day and the scores from around the grounds in the live blog below with reporter Jonathan Low. But Reading - a unusual side, devoid of the slenderest vestiges of commitment - need at least one point (and technically three) to ensure that they are not relegated.
Neil Warnock has achieved another promotion and this will surely go down as his best achievement as nobody thought that Cardiff would achieve the play-offs this season and that is his eighth promotion in his career.
"Maybe more on them because how many times have we seen a team that's ended up not getting the second automatic spot... and then don't end up getting promoted through the play-offs?"
He added: "Nobody gave us a chance".
Speaking to Sky Sports, the Cardiff boss said: "You make mistakes as a manager, say things you shouldn't and have wars at times, but I want to be remembered in the right way and this would be my biggest achievement by miles".
Birmingham's win helped them avoid relegation for the second successive campaign but there was misery for Burton Albion and Barnsley, who dropped into League One after losing 2-1 to Preston North End and 4-1 to Derby County respectively.
"I enjoyed working with the players a lot, never any issues with dressing-room unrest, always very focussed in training, enjoyed working with the group and obviously I've been keeping a keen eye on how they've done. They've got a really tough game this weekend (at Bournemouth); the next two games are pivotal".