Cardiff City's winning run came to an end in the EFL Championship, allowing Leeds United to close the gap at the top to two points.
After five consecutive wins to start the season, Cardiff was held at Fulham while Leeds was rampant against Burton Albion and Wolverhampton Wanderers, which is now third, also won.
At the other end of the table, Sunderland slipped to a third straight league defeat and pre-season favourite Aston Villa drew at home to Brentford.
Both the Bees and Bolton Wanderers remain winless, after the Trotters were comfortably beaten by Middlesbrough.
While Cardiff remains top and unbeaten in the second tier, it is now just two points clear of Leeds after six matches.
Neil Warnock's side was grateful to Danny Ward for a late equaliser at Fulham, after Ryan Sessegnon's opener, but the result pales next to Leeds's 5-0 demolition of Burton.
Pierre-Michel Lasogga netted a brace on his debut as Thomas Christiansen's men hit five, also scoring through Kalvin Phillips, Pablo Hernandez and Kemar Roofe.
Diogo Jota grabbed Wolves' only goal against Millwall, but Ipswich Town, which was previously second, lost 2-1 at Queens Park Rangers after strikes from Jamie Mackie and Luke Freeman.
Sunderland's bright start to the season has long since been forgotten as a third consecutive loss, at home to Sheffield United, left Simon Grayson's men 20th.
Clayton Donaldson netted twice on his debut for United to secure a 2-1 success and leave the promoted side fifth.
Aston Villa, which had been expected to challenge for promotion, is echoing Sunderland's struggles, with a goalless draw against Brentford leaving both sides at the wrong end of the table.
Brentford is yet to taste victory, but it is kept off the foot of the table by Bolton, beaten 3-0 by Boro, which was lifted by a Britt Assombalonga double.
Reading was a play-off finalist last season, but is struggling to build momentum this term, losing again after beating Birmingham City before the international break.
Aden Flint scored for Bristol City late at the Madejski Stadium, while Norwich City was also a 1-0 winner as Nelson Oliveira netted against Birmingham.
Preston North End and Barnsley are both alongside these teams in mid-table after a 1-1 draw at Deepdale.
In the late game, Sheffield Wednesday climbed into the top half with a 3-1 defeat of Nottingham Forest at Hillsborough.