Coventry City remain eight points clear at the top of the Championship table - despite suffering their first home loss of the season.
Frank Lampard's side lost 2-nil to third-place Ipswich.
But Middlesbrough missed the chance to close the gap at the summit, they were beaten 1-nil by Hull.
Sheffield Wednesday drew 0-0 with Blackburn Rovers
Elsewhere
Millwall 2-1 Bristol City
Wrexham 2-1 Preston
Norwich City 0-1 Watford
Oxford Utd 0-1 Swansea
Portsmouth 2-1 Charlton
West Brom 2-1 QPR
Leicester City 2-1 Derby County
Stoke City 1-2 Sheffield United
Middlesbrough 0-1 Hull City
Birmingham 1-1 Southampton