Bayern humiliate Arsenal 10-2 on aggregate after Laurent Koscielny sees red

Ten-man Arsenal crashed out of the Champions League last 16 for the seventh season in a row as Bayern Munich secured a 5-1 victory at Emirates Stadium to emphatically clinch the tie.

The Gunners were faced with a mammoth task to overturn the four-goal deficit from the first leg, but went in at the interval with a slither of hope thanks to Theo Walcott's thumping strike.

In reality a place in the quarter-finals was already beyond the hosts, but a red card for Laurent Koscielny for hauling down Robert Lewandowski for a penalty just after the break changed the complexion of the evening.

Arsene Wenger's hopes of salvaging pride, amidst the backdrop of protests for him to leave the club outside the stadium, were dashed as Lewandowski killed the tie for good by coolly converting from the spot.

The visitors then ran riot with Arjen Robben, substitute Douglas Costa and Arturo Vidal (2) clinching a 10-2 success on aggregate.

It was an all too familiar capitulation for the Gunners. They had fallen away badly when Koscielny left the pitch injured in Munich three weeks earlier, and while this time it was a sending off, their naivety with 10 men led to another humiliation.

The result will do little to quell the dark mood surrounding the club at present with questions over Wenger's future set to intensify in the coming days.

Wenger may point to Walcott's penalty shout in the first half and the fact the referee changed Koscielny's card from yellow to red following consultation with the official behind the goal. But what is really striking is how the Gunners buckle once it goes against them in high-profile matches.

The last half an hour of both legs of this tie illustrate the lack of backbone in the side and is the reason they consistently come up short in the title race and Europe. They go missing when the going gets tough and it's a familiar story that means a growing number of Gooners want a new man at the helm to help pen a different ending. Wenger deserves better than some of the chants heard outside the stadium before kick off, but it's hard to see how even an FA Cup triumph will see him turn it around this time.

Arturo Vidal (Bayern Munich). Took his two goals well and was a real menace on the counter attack as Arsenal fell apart at the back.

ARSENAL: Ospina 6; Bellerin 6, Mustafi 6, Koscielny 5, Monreal 6; Ramsey 6, Xhaka 6; Walcott 7, Oxlade-Chamberlain 7, Giroud 5; Sanchez 5. Subs: Perez 5, Coquelin 5, Ozil 5.

BAYERN MUNICH: Neuer 7; Rafinha 8, Hummels 7, Martínez 7, Alaba 8; Alonso 7, Thiago 8, Vidal 8; Robben 8, Ribery 7, Lewandowski 7. Subs: Costa 7, Kimmich 6, Sanches 6.

20' - GOAL! ARSENAL 1-0 BAYERN MUNICH. Arsenal lead on the night. Walcott surges on to a ball from the right of the area and sizzles a thumping shot above Neuer at the near post (Bayern lead 5-2 on aggregate).

33' - ARSENAL PENALTY SHOUT. Walcott turns on the right side of the box and goes down under a clumsy challenge from Alonso. The referee and the official behind the goal wave it away, but it's a huge shout for the Gunners who will feel aggrieved by the decision.

53' RED CARD! Koscielny is sent off for dragging back Lewandowski as he powered towards goal. An initial yellow was shown before the referee produced the red after speaking with the official behind the goal. Arsenal down to 10 and facing a penalty...

55' - GOAL! ARSENAL 1-1 BAYERN MUNICH. Lewandowski coolly sends Ospina the wrong way from the spot (Bayern lead 6-2 on aggregate).

68' - GOAL! ARSENAL 1-2 BAYERN MUNICH. Robben nicks it off Sanchez on the edge of his own box and fizzes a shot beyond Ospina (Bayern lead 7-2 on aggregate).

78' - GOAL! ARSENAL 1-3 BAYERN MUNICH. It's all about Costa as he hurdles a challenge on the right touchline by the halfway line and races towards the area. He steps inside a challenge and lashes a superb strike beyond Ospina from 20 yards. (Bayern lead 8-2 on aggregate).

80' - ARSENAL 1-4 BAYERN MUNICH The Bavarians are running riot now. Arsenal are caught on the counter once more and Vidal races through before dinking a lovely finish beyond Ospina. (Bayern lead 9-2 on aggregate).

85' - ARSENAL 1-5 BAYERN MUNICH It's five once more. Bayern ruthlessly tear Arsenal to pieces. Sanches plays it too Costa who lays it on a plate for Vidal to roll home. (Bayern lead 10-2 on aggregate).

Theo Walcott has scored four goals in his last four Champions League games at the Emirates.

This is Arsenal's 18th red card in the CL, one more than Bayern. Only Juventus have received more red cards (22).

This is Arsenal's biggest home defeat since November 1998 (5-0 loss to Chelsea in League Cup).

Only one Champions League tie has seen a greater margin of victory for a team than tonight - Bayern v Sporting (12-1, 2009).