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Man Utd v Arsenal
Old Trafford
Saturday 16 February
Fifth Round
Kick-off: 1715 GMT
Referee: A Wiley (Staffordshire)
Replay: Wed 27 February, 1945 GMT
BBC coverage: LIVE on BBC One, BBC Sport website, BBC Radio Five Live & highlights on Match of the Day.
Manchester United have Wayne Rooney and Patrice Evra back after suspension.
Striker Louis Saha is available after a knee injury after but right-back Gary Neville and left-back Mikael Silvestre remain sidelined.
Arsenal defenders Kolo Toure and Emmanuel Eboue are available after their Africa Cup of Nations stint.
But Theo Walcott (thigh), Gael Clichy (hamstring) and Bacary Sagna (personal reasons) are set to miss out, while Philippe Senderos (knee) is a doubt.
Man Utd (from): Van der Sar, Kuszczak, Brown, O'Shea, Simpson, Ferdinand, Vidic, Evra, Fletcher, Nani, Park, Scholes, Ronaldo, Anderson, Carrick, Hargreaves, Giggs, Tevez, Rooney, Saha, Welbeck.
Arsenal (from): Lehmann, Fabianski, Senderos, Hleb, Fabregas, Flamini, Adebayor, Eduardo, Bendtner, Traore, Song, J Hoyte, Gilberto, Gilbert, Randall, G Hoyte, Lansbury.
BIG-MATCH FACTS
The outstanding tie of the fifth round is Sir Alex Ferguson's 100th as manager of Manchester United.
The top two in the Premier League are also the most successful clubs in FA Cup history; United and Arsenal have won the world's oldest football knockout competition 21 times between them and have appeared in a combined 35 finals.
This is the 35th time Ferguson will have come up against his opposite number Arsene Wenger. Of the 34 previous encounters United have won 11, Arsenal 13. Eight of the 10 other games finished level and two were decided on penalty shoot-outs; United won the 2003 Community Shield, and Arsenal the 2005 FA Cup final.
FA CUP RECORDS AND BEST PERFORMANCES
MANCHESTER UNITED
Current form
Won 26 of 36 in all competitions this season.
Won six and drawn one of their seven league and cup games in 2008 (home and away) but lost their last match at Old Trafford, the 2-1 derby defeat to Manchester City on 10 February.
Recent FA Cup performance
Only failed to get past the fifth round in one of the last four years, and reached the final in each of the other three, winning in 2004.
The Manager
United have only been knocked out by top-flight opposition under Sir Alex Ferguson, and have failed to reach the final in 13 of 21 attempts.
They have won the cup a record five times in the stewardship of the current manager, who has led out the side for the final on eight occasions.
FA Cup fact
Drawn against Premier League opposition for the 10th successive round and third this season; knocked out Aston Villa (a) and Tottenham (h) in this current run.
ARSENAL
Current form
Won the last four league and cup games, and lost just one of 16; the second leg of the Carling Cup semi-final 5-1 to Tottenham at White Hart Lane on 22 January.
Emmanuel Adebayor has scored 10 goals in his last seven games for the Gunners.
Recent FA Cup performance
Finalists in all but one season between 2001 and 2005; but since winning the trophy in 2002, 2003 and 2005, have not got progressed beyond the last 16 (fourth round in 2006, and fifth round last season).
The Manager
Arsene Wenger has won the trophy with Arsenal four times. The Frenchman was involved in the first final to feature two managers from outside the British Isles; compatriot Gerard Houllier coached Liverpool to a 2-1 victory in 2001.
The Gunners have played 63 FA Cup ties under Wenger, losing only seven of them (including one to Leicester on penalties in the fourth round replay in 2000).
FA Cup fact
The Gunners have appeared in 17 finals, one fewer than Manchester United. Both clubs share the record for semi-finals appearances at 25 each.
HEAD to HEAD
All competitions
Arsenal are unbeaten in three matches against United (won two and drawn one in the Premier League) and have not lost to the Red Devils since a 2-0 league reverse at Old Trafford on 9 April 2006.
This season's one Premier League meeting at the Emirates Stadium resulted in a 2-2 draw on 3 November 2007. William Gallas put through his own goal to give United the lead, Fabregas equalised soon after half-time, Ronaldo put United back in front with eight minutes remaining and Gallas atoned for his earlier error by securing a point in stoppage time.
FA Cup
These clubs have been paired with one another 11 times and met on 12 occasions (one replay). They fought out a goalless draw after extra time in the most recent, the 2005 final at the Millennium Stadium. The Gunners won 5-4 in a dramatic penalty shoot-out, to tip the balance in their favour in the FA Cup head to head count.
But the most memorable clash between the pair in recent years was the 1999 semi-final, which United won 2-1 in a replay at Villa Park, courtesy of Ryan Giggs' spectacular solo 109th minute goal, and his subsequent shirt-swinging celebration.