Squad sheets: Leyton Orient v Arsenal

Much like Arsenal against Barcelona, Orient made it this far by withstanding Swansea domination in the last round and striking twice on the counterattack. They will surely need to produce a similarly defiant performance to have any chance of surviving this tie, especially as Arsène Wenger has vowed to field a strong team so as not to risk damaging his team's momentum. Given that most of Russell Slade's side have never faced a team of this calibre the likely absence of the midfielder Matt Spring, one of the few with experience of a higher level, risks being costly. Paul Doyle Venue Matchroom Stadium, Sunday 4.30pm Tickets Sold out Previous meetings Leyton Orient wins 2 Arsenal wins 7 Draws 1 Referee K Friend This season's league matches 23 Y 73, R 4, 3.52 cards per game Odds Leyton Orient 10-1 Arsenal 3-10 Draw 5-1 Leyton Orient Subs from Butcher, Forbes, McGleish, Jarvis, Spring, Téhoué, Kane, Carroll, Argent, Millwood, Odubajo, Benjamin Doubtful Spring (calf) Injured Chambers (shin, Apr) Suspended None Form guide (all comps) WWWDDW Disciplinary record Y44 R2 Leading scorer Revell 14 Arsenal Subs from Shea, Szczesny, Sagna, Nasri, Djourou, Van Persie, Walcott, Denílson, Clichy, Arshavin, Miquel Doubtful Djourou (back) Injured Vermaelen (achilles, 26 Feb), Fabianski (shoulder, Aug), Frimpong (knee, Aug) Suspended Diaby (second of three) Form guide (all comps) WWDWWW Disciplinary record Y59 R8 Leading scorer Nasri 14 Match pointers • Arsenal have not lost in the FA Cup to lower-league opposition since Arsène Wenger became manager – a run of 25 matches so far • Orient have kept only one clean sheet in their last 10 FA Cup matches • The last three times Arsenal have knocked Orient out of the FA Cup (1952, 1972 and 1978), they have gone on to lose in the final • Scott McGleish has scored a total of six goals in his last five FA Cup appearances • If Arsenal do not concede, it will be their 150th clean sheet in FA Cup history