Midweek trip for high-flying U's.
Fresh from a 2-0 win over Bristol City, the U's U21s will look to make it six wins in seven games in 2016 when they go to face Cardiff City.
The U's currently sit in third place but can leapfrog Millwall into second with all three points.
However, Cardiff sit just three points behind the U's, so it will represent a tough test for John McGreal's side.
The game kicks off at 2pm.
U's: Bransgrove, Vincent-Young, O'Donoghue, James, Olufemi,Harrison, Edge, Bailey, Curtis, Sembie-Ferris, Akinwande, McKeown, Pollard, Wilson