Tottenham's Wembley woes struck again as they were held to a frustrating 0-0 draw by Swansea City.
Harry Kane hit the crossbar in the second half and Spurs could have had a penalty when Martin Olsson touched the ball with his hand, but Swansea dug in for a hard-earned point.
Mauricio Pochettino's Spurs looked to have turned a corner at their new base with Wednesday's pulsating Champions League victory over Borussia Dortmund, but this result means they are winless at Wembley in the league this season.
At White Hart Lane last term, Tottenham took 18 points out of 18 against the division's bottom six -- a group that included Swansea and Burnley -- and that ruthlessness was key to their title challenge.
But this time around, Swansea and Burnley have left Wembley with a point, while Chelsea snatched all three.
Kane, who had hit six goals in four games before the match, was kept relatively quiet by a disciplined Swansea back line, while Dele Alli was lucky to see teammate Son Heung-min trudge off for Fernando Llorente late on after a fruitless display.
Son had started at left wing-back, with Ben Davies a surprise omission from Pochettino's starting lineup, presumably rested after his midweek exertions against Dortmund.
For Swansea, Renato Sanches retained his place despite an unconvincing debut against Newcastle last weekend, but fellow summer signing Wilfried Bony began as a substitute.
Son gave away a penalty when deployed further back against Chelsea in the FA Cup semifinal last term, but his defensive duties were few and far between in the first period.
He flashed a shot at Lukasz Fabianski's near post early on but the goalkeeper tipped it wide, just after scrambling away a dipping Kane free-kick from 30 yards.
For all Tottenham's possession, however, the hosts struggled for chances before the break and Swansea could have made more of a rare counter-attack when Jan Vertonghen and Davinson Sanchez successively failed to clear.
Spurs emerged with renewed vigour after the interval and a more aggressive approach, running directly at their opponents rather than tapping the ball around in front of them.
Olsson was twice fortunate not to concede a penalty after first blocking Toby Alderweireld's progress and then touching a loose ball with his hand, but referee Mike Dean was unmoved.
On both occasions, Dean might argue that Olsson had been unable to move out of the way.
Tottenham went closest just before the hour mark, when Son's angled shot was saved by Fabianski before Moussa Sissoko cut back to Kane and the forward's finish rattled the crossbar.
Pochettino threw on Llorente for his league debut in the hope of a winner against his former club, but only another penalty claim roused the crowd late on.
This time substitute Serge Aurier broke away from Jordan Ayew and into the box before falling to the ground, but the full-back seemed to trip more over his own feet than have been a victim of any contact from his opponent.
It summed up Tottenham's frustrating evening.