Coventry City have gone second in the Under 21 League 2 North table after their 2-0 win against Crewe.
The Sky Blues have nine points from four games, one point less than Hull City who won 3-0 at Barnsley on Tuesday afternoon.
Results from the last two days
Barnsley 0-3 Hull City
Birmingham City 1-2 Leeds United
Coventry City 2-0 Crewe Alexandra
Cardiff City 3-0 Brentford
Queens Park Rangers 5-2 Crystal Palace
Colchester United 2-1 Charlton Athletic
Sheffield United 1-1 Sheffield Wednesday