Chelsea through as showdowns set up

Chelsea FC became the fifth side to make the round of 16 despite losing to FC Basel 1893, who like Arsenal FC, Borussia Dortmund, AC Milan and AFC Ajax earned a crucial win.

Chelsea FC have put last season's UEFA Champions League group stage elimination behind them as they became the fifth side to make the round of 16 despite losing 1-0 at FC Basel 1893.

That result was good enough for Chelsea thanks to FC Schalke 04's failure to win but results elsewhere mean five places in the knockout rounds will still be up for grabs when Groups E–H conclude on 11 December, with nine teams in contention. UEFA.com reviews the action.

Qualified for last 16: Chelsea FC, Club Atlético de Madrid, FC Barcelona (plus, from other sections, FC Bayern München, Manchester City FC)

Guaranteed at least UEFA Europa League spot: FC Basel 1893, FC Schalke 04, Arsenal FC, Borussia Dortmund, SSC Napoli, FC Zenit, FC Porto, AFC Ajax, AC Milan

Eliminated from Europe: FC Steaua Bucureşti, Olympique de Marseille, FK Austria Wien, Celtic FC

The only section that began today with all four sides knowing they could still either go through or be eliminated was Group E and now Chelsea are in the last 16 while Steaua, held 0-0 by Schalke, can no longer make it. Chelsea fell to a late goal at Basel, who moved one point ahead of Schalke, at home to the Swiss club on 11 December. Chelsea, a point in front of Basel, will end up in the top two following Schalke's failure to win but Steaua cannot finish above fourth even if they win in London next month.

In Group F no teams were through this morning and that remains the case. Arsenal have a three-point lead after ending Marseille's European campaign with a 2-0 victory while Dortmund beat Napoli 3-1 to overtake them on head-to-head record. If the Gunners lose in Naples in a fortnight and Dortmund beat OM, either Arsenal or Napoli will be the first club to exit this competition with 12 points.

Atlético had won Group G before today but their 100% record was halted in the early game with a 1-1 draw at Zenit. Later on, Austria finally got the first goal of their maiden campaign but were pegged back for a 1-1 draw themselves at Porto to curtail their European hopes. Porto remain a point behind second-placed Zenit with an inferior head-to-head record, so must beat Atlético and hope Zenit do not prevail at Austria.

Barcelona were already through from Group H at kick-off but have not clinched pole position following a 2-1 reverse at Ajax. Milan triumphed 3-0 at Celtic to stay a point clear of the Dutch outfit, who they host on 11 December. Celtic will come bottom even if they potentially deny Barcelona first place with an away success.

Groups A–D continue on Wednesday with, so far, only holders Bayern and Manchester City guaranteed qualification.

Group E
FC Basel 1893 1-0 Chelsea FC
FC Steaua Bucureşti 0-0 FC Schalke 04

Group F
Arsenal FC 2-0 Olympique de Marseille
Borussia Dortmund 3-1 SSC Napoli

Group G
FC Zenit 1-1 Club Atlético de Madrid
FC Porto 1-1 FK Austria Wien

Group H

Celtic FC 0-3 AC Milan
AFC Ajax 2-1 FC Barcelona

Top