Wolves are top of the Championship after sweeping aside midlands rivals Aston Villa 2-0.
Second-half goals from Jota and Leo Bonatini earned Wolves the three points that moved them above Cardiff at the summit.
Nuno Espirito Santo's men are two points clear after ending Villa's four-match winning run.
Chris Basham scored the only goal as Sheffield United moved level on points with Cardiff.
Basham struck early in the second half in a 1-0 win against Ipswich that left the Blades just one goal off first place.
At the bottom end of the table, Bolton -- promoted with the Blades from League One last term -- finally earned their first win since their return to the Championship by beating Sheffield Wednesday 2-1.
Phil Parkinson's side had not found the net in any competition since August -- a 3-2 win in the Carabao Cup against Wednesday -- and the Owls made obliging guests once more.
Sammy Ameobi put Bolton ahead in the 10th minute before Sam Hutchinson put through his own net just after the hour mark.
Kieran Lee pulled one back for Wednesday with 22 minutes left but Bolton held on for their first win in 12 league games.
Denis Odoi struck six minutes into stoppage time as Fulham came from two goals down to draw 2-2 with Preston.
Jordan Hugill gave the visitors the lead in the 18th minute before Sean Maguire added a second seven minutes later.
Oliver Norwood pulled one back from the penalty spot with 16 minutes left before Odoi completed the comeback.
Sunderland's miserable home form continued as they were held 1-1 by QPR.
The hosts -- without a win at the Stadium of Light since December 2016 -- needed a second-half equaliser from Aiden McGeady to earn a point after Idrissa Sylla's 37th-minute opener.
An explosive start at Barnsley soon fizzled out as the Tykes drew 2-2 with Middlesbrough.
Ashley Fletcher's own goal was cancelled out by Martin Braithwaite but Cameron McGeehan headed in his first goal for Barnsley to restore their lead after just nine minutes.
The game's other goal came from Britt Assombalanga on the hour mark.
A stoppage-time equaliser from Nelson Oliveira denied 10-man Hull a win at Norwich.
Nouha Dicko put the Tigers ahead before David Meyler was sent off for two bookable offences, and Norwich eventually made them pay six minutes into added time.
Elsewhere, Leeds and Millwall both missed late penalties as they suffered 1-0 defeats to Reading and Brentford respectively.