Man U & Arsenal, Who's taking it down?

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.

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.