The remaining Round of 16 slots will be decided on Tuesday and Wednesday as the 2013 AFC Champions League group campaign goes down to the wire. All four former winners will battle hard for a place in the knockout stage but Jeonbuk Motors need just a point to go through, while a win can secure Pohang Steelers' progression.

Al Ain and Urawa Red Diamonds, though, must win their respective games and hope other results also go their way if they are to make it through. Join as preview these showdowns across the continent.

The match
Pohang Steelers-Bunyodkor
While the re-match at Pohang marks the pair’s sixth meeting, both teams are all too aware it is a game they can't afford to lose. Leading Group G a point clear of Beijing Guoan, Bunyodkor travel to Korea Republic knowing a draw is enough to take them through. Trailing the visitors by three points, though, a home victory will see Pohang edge the Uzbek giants on head-to-head results.

The pair first met in the 2009 quarter-finals, when the K League outfit emerged aggregate winners en route to claiming their first Asian title. This fast-developed rivalry resumed in the group campaign last year, but it was Bunyodkor that won away, and then home, to progress at Pohang's expense.

Despite losing 2-0 at Beijing Guoan previously, Pohang have remained undefeated on the home front, with a recent 1-1 draw at Jeonbuk maintaining their place at the summit. But they will be wary of the Uzbeks' brilliant away form, which has seen them snatch full points at Sanfrecce Hiroshima and Beijing Guoan.

Beijing Guoan travels to Sanfrecce Hiroshima aware that three points can secure progression regardless of the other results. In order to get the result they need, coach Aleksandar Stanojevic opted to rest key players in Saturday's C-League fixture at Dalian Aerbin, which they lost 3-0.

The other attractions
With Group A's two qualifying spots already taken, both debutants Tractor Sazi and Al Jazira face El Jaish and Al Shabab with only pride to play for. The same can be said of Group C's Al Nasr and Sepahan, who will take on the qualified duo of Al Ahli and Al Gharafa respectively.

The most open section with all four sides still harbouring qualifying hopes, Group B's focus, of course, is on the top-of-the-standing clash between hosts Lekhwiya and Al Ettifaq, both of whom can progress with a win. In the other match, Pakhtakor entertain Al Shabab Al Arabi with both sides facing a must-win scenario.

Group D's Al Hilal face a straightforward task, with a point at eliminated Al Rayyan enough to see them through. If they lose, the result will offer Al Ain a chance, provided they defeat the already qualified Esteghlal at home.

In Group E, Vegalta Sendai and Buriram United share second place aiming for a berth behind section winners FC Seoul. The Japanese side welcome struggling Jiangsu Sainty, who have gone six matches winless on the home front, while the Thai outfit challenge in-form FC Seoul.

Having sealed qualification with a match to spare, Marcello Lippi's Guangzhou Evergrande have fixed their sights on winning Group F heading into the home game against Jeonbuk. A draw can seal the hosts' pole position and also book the visitors' progression. However, Jeonbuk will be vigilant of the Chinese champions’ prolific from, which saw them defeat city rivals R&F 2-0 to move to the top of the local table.

If recent form is anything to go by, Group G's Central Coast Mariners look set to book progression with a home win against qualified Kashiwa Reysol, who lost 4-0 to Omiya Ardija on Friday. Any slip-up by the newly-crowned Australian champions will, though, provide an opportunity for Guizhou Renhe, who entertain eliminated Suwon Bluewings.

Player to watch
Qatari international Sebastian Soria's goal-scoring form is the key for Lekhwiya in grabbing a home win against Al Ettifaq. The 29-year-old marksman finished the Qatari season top-scorer with 19 goals despite his side conceding the domestic title to Al Sadd, while also being on target four times in this year's Asian campaign.

The stat
- Imported stars continue to dominate this year's Champions League, with four of the top five goal-scorers hailing from outside Asia.

What they said
"We are the best team from Thailand, but it is not easy against Asia's best. But this is our first time in the AFC Champions League and it has been a good opportunity to play at a higher level,” Muang Thong coach Slavisa Jokanovic

2013 AFC Champions League matchday 6 fixtures
30 April & 1 May
Group A: Tractor Sazi-El Jaish, Al Shabab-Al Jazira
Group B: Pakhtakor-Al Shabab Al Arabi, Lekhwiya-Al Ettifaq
Group C: Sepahan-Al Gharafa, Al Ahli-Al Nasr
Group D: Al Rayyan-Al Hilal, Al Ain-Esteghlal
Group E: FC Seoul-Buriram United, Vegalta Sendai-Jiangsu Sainty
Group F: Guangzhou Evergrande-Jeonbuk Motors, Muang Thong United-Urawa Red Diamonds
Group G: Sanfrecce Hiroshima-Beijing Guoan, Pohang Steelers-Bunyodkor
Group H: Central Coast Mariners-Kashiwa Reysol, Guizhou Renhe-Suwon Bluewings