Arsenal crashed out of the FA Cup in the fifth round after a shock 1-0 defeat to Blackburn at the Emirates on Saturday.
The Gunners brought back Thomas Vermaelen into the starting XI but, with one eye on Bayern Munich in the Champions League in midweek, left Jack Wilshere on the bench.
After Blackburn goalkeeper Jake Kean had palmed away a fine header from Abou Diaby, the returning Gervinho had the best chance of the half as he was put through but slid his shot wide of the post.
Arsenal dominated possession and racked up numerous corners which came to nothing and went into half-time tied at 0-0. The Ivorian then had another good chance after the break but was closed down by Grant Hanley as he got his shot off and, seconds after Arsenal made a triple change to introduce Wilshere, Theo Walcott and Santi Cazorla, Rovers struck.
On the counter, and against the run of play, Wojciech Szczesny parried Martin Olsson's shot back out and Colin Kazim-Richards pounced to divert it into the net past Laurent Koscielny on the line.
The pace of Walcott caused Rovers' defence problems and Nacho Monreal dragged a shot wide, but ultimately it was not enough to save the Gunners and Walcott's tame header was saved by man-of-the-match Kean late on.
League Two Oldham stunned Everton with an injury-time equaliser to earn a replay at Goodison Park and keep their hopes alive of a double Merseyside scalp.
Matt Smith, who scored twice in the Latics' victory over Liverpool in the fourth round, was again the hero, nodding home a corner seconds before the full time whistle.
Oldham had taken the lead in the 13th minute through Jordan Obita after he turned home Lee Croft's shot at the back post.
Victor Anichebe brought Everton level with a powerful strike just 11 minutes later after a knock down from Nikica Jelavic before Phil Jagielka headed home from a Leighton Baines corner early in the second half.
Substitute Smith had already tested Tim Howard with a low shot and the American also repelled a Robbie Simpson shot before Smith hung in the air from a last minute corner to send Boundary Park into raptures.
Blue Square Bet Premier team Luton Town fell 3-0 to Championship Millwall in the FA Cup fifth round after two goals in the first half.
The Hatters went behind in the 12th minute as a back-header from Ronnie Henry failed to find Mark Tyler in the Luton goal and James Henry raced onto it to round the goalkeeper and slot home into an empty net.
Luton went further behind before the break as Henry's cross found Rob Hulse in the box. The striker miscued his header up into the air, but kept his composure to hook the falling ball over his shoulder and into the far corner.
In a fairly uneventful second half, the Lions kept striker Scott Rendell quiet and could have extended their lead as Andy Keogh was first denied by a flying save from Tyler and then sent his header wide from a few yards out when the ball came back in.
The rout was complete in the 85th minute, though, as Dany N'Guessan pounced on a rebound to slot home the third and book his side's place in the quarter-finals.
Barnsley sealed their place in the quarter-finals with a relatively comfortable 3-1 win over MK Dons.
The Championship side reached the semi-finals and knocked out Chelsea in 2008, and are now into the last eight again as they took the lead inside three minutes through Chris Dagnall's fifth goal in seven games.
Then all the work for the second was done by Scott Wiseman who got free on the right and cut back to Marlon Harewood to side-foot into bottom left corner.
In the second half, Kelvin Etuhu was taken off injured after a seven-minute delay and MK Dons were allowed back into the game as Dean Bowditch was left alone to slot home from 15 yards. It was not enough though, as Dagnall netted his second of the game in injury time to seal the win before Alan Smith was shown a red card.
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