Bluebirds visit Florence Park on Monday.
The U's hopefuls have enjoyed a strong start to the season, currently sitting top of the table after eight games.
The Bluebirds come to town sitting just three points behind the U's in the league and will provide John McGreal's side with a tough test.
John will be without Jamie Harney in the heart of defence after the ex-West Ham man injured his knee in last week's win over Bournemouth, but Michael O'Donoghue continues his road to recovery after his own knee injury.
Kieran Bailey is also edging closer to fitness having spent the season so far on the sidelines.
The match kicks off at 1pm at Florence Park.
U's: Barnes, Robinson, Andrews, Wilson, James, O'Donoghue, Curtis, Regis, Dunne, Edge, Wright, Lawrence, Brown, Pollard, Bailey, McKeown, Tennent